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-rw-r--r--tests/ccgbugs/m1/defs.nim4
-rw-r--r--tests/ccgbugs/m19445.c3
-rw-r--r--tests/ccgbugs/m2/defs.nim4
-rw-r--r--tests/ccgbugs/mstatic_assert.nim6
-rw-r--r--tests/ccgbugs/mymodule.nim14
-rw-r--r--tests/ccgbugs/pkg8616/rtarray.nim2
-rw-r--r--tests/ccgbugs/pkg8616/scheduler.nim10
-rw-r--r--tests/ccgbugs/t10128.nim18
-rw-r--r--tests/ccgbugs/t10964.nim7
-rw-r--r--tests/ccgbugs/t13062.nim33
-rw-r--r--tests/ccgbugs/t13902.nim12
-rw-r--r--tests/ccgbugs/t15428.nim22
-rw-r--r--tests/ccgbugs/t16027.nim13
-rw-r--r--tests/ccgbugs/t16374.nim38
-rw-r--r--tests/ccgbugs/t19445.nim13
-rw-r--r--tests/ccgbugs/t20139.nim10
-rw-r--r--tests/ccgbugs/t20141.nim27
-rw-r--r--tests/ccgbugs/t20787.nim4
-rw-r--r--tests/ccgbugs/t21116.nim10
-rw-r--r--tests/ccgbugs/t21972.nim33
-rw-r--r--tests/ccgbugs/t21995.nim9
-rw-r--r--tests/ccgbugs/t22462.nim20
-rw-r--r--tests/ccgbugs/t23796.nim25
-rw-r--r--tests/ccgbugs/t2procs.nim18
-rw-r--r--tests/ccgbugs/t5296.nim21
-rw-r--r--tests/ccgbugs/t5345.nim10
-rw-r--r--tests/ccgbugs/t6279.nim9
-rw-r--r--tests/ccgbugs/t6756.nim24
-rw-r--r--tests/ccgbugs/t7079.nim9
-rw-r--r--tests/ccgbugs/t8616.nim4
-rw-r--r--tests/ccgbugs/t8781.nim25
-rw-r--r--tests/ccgbugs/t8967.nim14
-rw-r--r--tests/ccgbugs/t9098.nim12
-rw-r--r--tests/ccgbugs/t9286.nim22
-rw-r--r--tests/ccgbugs/t9578.nim76
-rw-r--r--tests/ccgbugs/t9655.nim30
-rw-r--r--tests/ccgbugs/taddhigh.nim19
-rw-r--r--tests/ccgbugs/targ_lefttoright.nim71
-rw-r--r--tests/ccgbugs/tarray_equality.nim15
-rw-r--r--tests/ccgbugs/tassign_nil_strings.nim13
-rw-r--r--tests/ccgbugs/tborrowmagic.nim8
-rw-r--r--tests/ccgbugs/tbug1081.nim34
-rw-r--r--tests/ccgbugs/tbug21505.nim39
-rw-r--r--tests/ccgbugs/tcapture_static.nim13
-rw-r--r--tests/ccgbugs/tccgen1.nim67
-rw-r--r--tests/ccgbugs/tccgissues.nim14
-rw-r--r--tests/ccgbugs/tcgbug.nim163
-rw-r--r--tests/ccgbugs/tclosureeq.nim19
-rw-r--r--tests/ccgbugs/tcodegenbug1.nim185
-rw-r--r--tests/ccgbugs/tcodegenbug_bool.nim11
-rw-r--r--tests/ccgbugs/tcodegendecllambda.nim14
-rw-r--r--tests/ccgbugs/tcompile_time_var_at_runtime.nim11
-rw-r--r--tests/ccgbugs/tctypes.nim43
-rw-r--r--tests/ccgbugs/tcvarargs.nim35
-rw-r--r--tests/ccgbugs/tdeepcopy_addr_rval.nim17
-rw-r--r--tests/ccgbugs/tderefblock.nim76
-rw-r--r--tests/ccgbugs/tescaping_temps.nim31
-rw-r--r--tests/ccgbugs/tforward_decl_only.nim34
-rw-r--r--tests/ccgbugs/tgeneric_closure.nim34
-rw-r--r--tests/ccgbugs/tgeneric_smallobj_asgn_opt.nim27
-rw-r--r--tests/ccgbugs/thtiobj.nim9
-rw-r--r--tests/ccgbugs/tissues.nim38
-rw-r--r--tests/ccgbugs/tlvalueconv.nim32
-rw-r--r--tests/ccgbugs/tmangle.nim16
-rw-r--r--tests/ccgbugs/tmangle_field.nim16
-rw-r--r--tests/ccgbugs/tmarkerproc_regression.nim47
-rw-r--r--tests/ccgbugs/tmissing_ccgtrav_unique_type.nim12
-rw-r--r--tests/ccgbugs/tmissingbracket.nim53
-rw-r--r--tests/ccgbugs/tmissingderef.nim40
-rw-r--r--tests/ccgbugs/tmissingderef2.nim25
-rw-r--r--tests/ccgbugs/tmissinginit.nim31
-rw-r--r--tests/ccgbugs/tmissingvolatile.nim21
-rw-r--r--tests/ccgbugs/tnil_type.nim15
-rw-r--r--tests/ccgbugs/tnoalias.nim13
-rw-r--r--tests/ccgbugs/tnocodegen_for_compiletime.nim9
-rw-r--r--tests/ccgbugs/tobjconstr_bad_aliasing.nim76
-rw-r--r--tests/ccgbugs/tobjconstr_outoforder.nim38
-rw-r--r--tests/ccgbugs/tobjconstr_regression.nim14
-rw-r--r--tests/ccgbugs/topenarraycast.nim8
-rw-r--r--tests/ccgbugs/tpartialcs.nim20
-rw-r--r--tests/ccgbugs/tprogmem.nim11
-rw-r--r--tests/ccgbugs/trecursive_table.nim17
-rw-r--r--tests/ccgbugs/trefseqsort.nim33
-rw-r--r--tests/ccgbugs/tresult_of_array.nim29
-rw-r--r--tests/ccgbugs/tret_arg_init.nim28
-rw-r--r--tests/ccgbugs/tsamename3.nim120
-rw-r--r--tests/ccgbugs/tsequence_outoforder.nim11
-rw-r--r--tests/ccgbugs/tsighash_typename_regression.nim32
-rw-r--r--tests/ccgbugs/tstringslice.nim20
-rw-r--r--tests/ccgbugs/tunsafeaddr.nim47
-rw-r--r--tests/ccgbugs/tuple_canon.nim119
-rw-r--r--tests/ccgbugs/tuplecast.nim8
-rw-r--r--tests/ccgbugs/tweakopenarray.nim12
-rw-r--r--tests/ccgbugs/twrong_discriminant_check.nim30
-rw-r--r--tests/ccgbugs/twrong_method.nim27
-rw-r--r--tests/ccgbugs/twrong_rc_for_refarray.nim26
-rw-r--r--tests/ccgbugs/twrong_string_asgn.nim19
-rw-r--r--tests/ccgbugs/twrong_tupleconv.nim35
-rw-r--r--tests/ccgbugs/twrongrefcounting.nim33
-rw-r--r--tests/ccgbugs/xarray9578.nim7
-rw-r--r--tests/ccgbugs/xoa9578.nim4
-rw-r--r--tests/ccgbugs/xseq9578.nim7
-rw-r--r--tests/ccgbugs/xtuple9578.nim7
-rw-r--r--tests/ccgbugs/xua9578.nim7
104 files changed, 2826 insertions, 0 deletions
diff --git a/tests/ccgbugs/m1/defs.nim b/tests/ccgbugs/m1/defs.nim
new file mode 100644
index 000000000..ed78d8b72
--- /dev/null
+++ b/tests/ccgbugs/m1/defs.nim
@@ -0,0 +1,4 @@
+type MyObj* = object
+  field1*: int
+  s*: string
+  ch*: char
diff --git a/tests/ccgbugs/m19445.c b/tests/ccgbugs/m19445.c
new file mode 100644
index 000000000..74c23d4b4
--- /dev/null
+++ b/tests/ccgbugs/m19445.c
@@ -0,0 +1,3 @@
+#include "m19445.h"
+
+const Foo f = {10, 20, 30, 40};
\ No newline at end of file
diff --git a/tests/ccgbugs/m2/defs.nim b/tests/ccgbugs/m2/defs.nim
new file mode 100644
index 000000000..798d1fea8
--- /dev/null
+++ b/tests/ccgbugs/m2/defs.nim
@@ -0,0 +1,4 @@
+type MyObj* = object
+  s*: string
+  field1*: int
+  ch*: char
diff --git a/tests/ccgbugs/mstatic_assert.nim b/tests/ccgbugs/mstatic_assert.nim
new file mode 100644
index 000000000..dbf9c03d1
--- /dev/null
+++ b/tests/ccgbugs/mstatic_assert.nim
@@ -0,0 +1,6 @@
+{.emit:"""
+NIM_STATIC_ASSERT(sizeof(bool) == 1, "");
+#warning "foo2"
+NIM_STATIC_ASSERT(sizeof(bool) == 2, "");
+#warning "foo3"
+""".}
diff --git a/tests/ccgbugs/mymodule.nim b/tests/ccgbugs/mymodule.nim
new file mode 100644
index 000000000..8c78cdf9b
--- /dev/null
+++ b/tests/ccgbugs/mymodule.nim
@@ -0,0 +1,14 @@
+type
+  MyRefObject* = ref object
+    s: string
+  
+  BaseObj* = ref object of RootObj
+  ChildObj* = ref object of BaseObj
+
+proc newMyRefObject*(s: string): MyRefObject =
+  new(result)
+  result.s = s
+  
+proc `$`*(o: MyRefObject): string =
+  o.s
+  
\ No newline at end of file
diff --git a/tests/ccgbugs/pkg8616/rtarray.nim b/tests/ccgbugs/pkg8616/rtarray.nim
new file mode 100644
index 000000000..286dbb8cd
--- /dev/null
+++ b/tests/ccgbugs/pkg8616/rtarray.nim
@@ -0,0 +1,2 @@
+proc head*[T](pp: var array[1,T]): var T =
+  result = pp[0]
diff --git a/tests/ccgbugs/pkg8616/scheduler.nim b/tests/ccgbugs/pkg8616/scheduler.nim
new file mode 100644
index 000000000..0730000c4
--- /dev/null
+++ b/tests/ccgbugs/pkg8616/scheduler.nim
@@ -0,0 +1,10 @@
+import rtarray
+
+type
+  T = tuple[x:int]
+
+var
+  arr: array[1,T]
+
+proc init*() =
+  discard head(arr)
diff --git a/tests/ccgbugs/t10128.nim b/tests/ccgbugs/t10128.nim
new file mode 100644
index 000000000..48970916f
--- /dev/null
+++ b/tests/ccgbugs/t10128.nim
@@ -0,0 +1,18 @@
+# bug #10128
+let data = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"
+var seq2 = newSeq[char](data.len)
+for i in 0..<data.len:
+  seq2[i] = data[i]
+
+let c = '\128'
+
+# case 1
+doAssert data[c.int] == 'y'
+doAssert seq2[c.int] == 'y'
+
+proc play(x: openArray[char]) =
+  doAssert x[c.int] == 'y'
+
+# case2
+play(data)
+play(seq2)
\ No newline at end of file
diff --git a/tests/ccgbugs/t10964.nim b/tests/ccgbugs/t10964.nim
new file mode 100644
index 000000000..c19db6997
--- /dev/null
+++ b/tests/ccgbugs/t10964.nim
@@ -0,0 +1,7 @@
+func test*(input: var openArray[int32], start: int = 0, fin: int = input.len - 1) =

+    discard

+

+var someSeq = @[1'i32]

+

+test(someSeq)

+# bug with gcc 14
\ No newline at end of file
diff --git a/tests/ccgbugs/t13062.nim b/tests/ccgbugs/t13062.nim
new file mode 100644
index 000000000..cfda1da7c
--- /dev/null
+++ b/tests/ccgbugs/t13062.nim
@@ -0,0 +1,33 @@
+discard """
+  matrix: "--mm:refc; --mm:orc"
+  targets: "c cpp"
+"""
+
+import atomics
+
+type
+  Pledge* {.exportc.} = object
+    p: PledgePtr
+
+  PledgeKind {.exportc.} = enum
+    Single
+    Iteration
+
+  PledgePtr {.exportc.} = ptr object
+    case kind: PledgeKind
+    of Single:
+      impl: PledgeImpl
+    of Iteration:
+      discard
+
+  PledgeImpl {.exportc.} = object
+    fulfilled: Atomic[bool]
+
+var x: Pledge
+when defined(cpp):
+  # TODO: fixme
+  discard "it doesn't work for refc/orc because of contrived `Atomic` in cpp"
+elif defined(gcRefc):
+  doAssert x.repr == "[p = nil]"
+else: # fixme # bug #20081
+  doAssert x.repr == "Pledge(p: nil)"
diff --git a/tests/ccgbugs/t13902.nim b/tests/ccgbugs/t13902.nim
new file mode 100644
index 000000000..fd4f76d15
--- /dev/null
+++ b/tests/ccgbugs/t13902.nim
@@ -0,0 +1,12 @@
+
+#issue #13902
+block:
+  type Slot = distinct uint64
+  var s = Slot(1)
+  proc `$`(x: Slot): string {.borrow.}
+  proc `+=`(x: var Slot, y: uint64) {.borrow.}
+  # test was failing with either 0 or 2 echos but not with 1 echo
+  # echo "s = ", s
+  s += 1
+  # echo "s = ", s
+  doAssert s.uint64 == 2, $s # was failing, showing 18419607611339964418
diff --git a/tests/ccgbugs/t15428.nim b/tests/ccgbugs/t15428.nim
new file mode 100644
index 000000000..d9ae8ff16
--- /dev/null
+++ b/tests/ccgbugs/t15428.nim
@@ -0,0 +1,22 @@
+discard """

+    cmd: "nim $target --mm:refc $file"

+    output: '''5

+5

+[1, 2, 3, 4, 5]

+(data: [1, 2, 3, 4, 5])

+'''

+"""

+

+proc take[T](f: openArray[T]) =

+  echo f.len

+let f = @[0,1,2,3,4]

+take(f.toOpenArray(0,4))

+

+{.experimental: "views".}

+type

+  Foo = object

+    data: openArray[int]

+let f2 = Foo(data: [1,2,3,4,5])

+echo f2.data.len

+echo f2.data

+echo f2
\ No newline at end of file
diff --git a/tests/ccgbugs/t16027.nim b/tests/ccgbugs/t16027.nim
new file mode 100644
index 000000000..58f15eb6e
--- /dev/null
+++ b/tests/ccgbugs/t16027.nim
@@ -0,0 +1,13 @@
+discard """
+  ccodecheck: "__restrict__"
+  action: compile
+  joinable: false
+"""
+
+# see bug #16027
+iterator myitems(s: seq[int]): int =
+  var data {.codegenDecl: "$# __restrict__ $#".} : ptr int = nil
+  yield 1
+
+for i in @[1].myitems:
+  discard
diff --git a/tests/ccgbugs/t16374.nim b/tests/ccgbugs/t16374.nim
new file mode 100644
index 000000000..8ccfa4815
--- /dev/null
+++ b/tests/ccgbugs/t16374.nim
@@ -0,0 +1,38 @@
+discard """
+  matrix: "--gc:refc; --gc:orc"
+"""
+
+block:
+  iterator mvalues(t: var seq[seq[int]]): var seq[int] =
+    yield t[0]
+
+  var t: seq[seq[int]]
+
+  while false:
+    for v in t.mvalues:
+      discard
+
+  proc ok =
+    while false:
+      for v in t.mvalues:
+        discard
+
+  ok()
+
+block:
+  iterator mvalues(t: var seq[seq[int]]): lent seq[int] =
+    yield t[0]
+
+  var t: seq[seq[int]]
+
+  while false:
+    for v in t.mvalues:
+      discard
+
+  proc ok =
+    while false:
+      for v in t.mvalues:
+        discard
+
+  ok()
+
diff --git a/tests/ccgbugs/t19445.nim b/tests/ccgbugs/t19445.nim
new file mode 100644
index 000000000..b6e8d028c
--- /dev/null
+++ b/tests/ccgbugs/t19445.nim
@@ -0,0 +1,13 @@
+discard """
+  matrix: "--nimcache:tests/ccgbugs/nimcache19445 --cincludes:nimcache19445 --header:m19445"
+  targets: "c"
+"""
+
+# bug #19445
+type
+  Foo* {.exportc.} = object
+    a*, b*, c*, d*: int
+
+proc dummy(): Foo {.exportc.} = discard
+
+{.compile:"m19445.c".}
\ No newline at end of file
diff --git a/tests/ccgbugs/t20139.nim b/tests/ccgbugs/t20139.nim
new file mode 100644
index 000000000..4592b994d
--- /dev/null
+++ b/tests/ccgbugs/t20139.nim
@@ -0,0 +1,10 @@
+discard """
+  joinable: false
+"""
+
+# bug #20139
+import m1/defs as md1
+import m2/defs as md2
+
+doAssert $(md1.MyObj(field1: 1)) == """(field1: 1, s: "", ch: '\x00')"""
+doAssert $(md2.MyObj(field1: 1)) == """(s: "", field1: 1, ch: '\x00')"""
diff --git a/tests/ccgbugs/t20141.nim b/tests/ccgbugs/t20141.nim
new file mode 100644
index 000000000..60e130690
--- /dev/null
+++ b/tests/ccgbugs/t20141.nim
@@ -0,0 +1,27 @@
+discard """
+  joinable: false
+"""
+
+# bug #20141
+type
+  A = object
+  B = object
+  U = proc()
+
+proc m(h: var B) = discard
+
+template n[T, U](x: U): T =
+  static: doAssert true
+  cast[ptr T](addr x)[]
+
+proc k() =
+  var res: A
+  m(n[B, A](res))
+
+proc w(mounter: U) = discard
+
+proc mount(proto: U) = discard
+proc v() = mount k
+
+# This is required for failure
+w(v)
diff --git a/tests/ccgbugs/t20787.nim b/tests/ccgbugs/t20787.nim
new file mode 100644
index 000000000..c2d848c2c
--- /dev/null
+++ b/tests/ccgbugs/t20787.nim
@@ -0,0 +1,4 @@
+type
+  Obj = object
+    f: UncheckedArray[byte]
+let o = new Obj
\ No newline at end of file
diff --git a/tests/ccgbugs/t21116.nim b/tests/ccgbugs/t21116.nim
new file mode 100644
index 000000000..cc77de198
--- /dev/null
+++ b/tests/ccgbugs/t21116.nim
@@ -0,0 +1,10 @@
+discard """
+  targets: "c cpp"
+  disabled: windows
+"""
+# bug #21116
+import std/os
+
+proc p(glob: string) =
+  for _ in walkFiles(glob): discard
+p("dir/*")
diff --git a/tests/ccgbugs/t21972.nim b/tests/ccgbugs/t21972.nim
new file mode 100644
index 000000000..58d0cfc62
--- /dev/null
+++ b/tests/ccgbugs/t21972.nim
@@ -0,0 +1,33 @@
+discard """

+    targets: "c cpp"

+    outputsub: "Error: unhandled exception: Err2 [IOError]"

+    exitcode: "1"

+"""

+

+proc bar(x: var int) =

+  inc x

+  if x == 3:

+    raise newException(ValueError, "H0")

+

+  elif x == 5:

+    raise newException(IOError, "H1")

+

+  elif x > 7:

+    raise newException(IOError, "H2")

+

+

+proc foo() =

+  var i = 0

+  while true:

+    try:

+      bar(i)

+      echo i

+

+    except ValueError:

+      debugEcho("ValueError")

+

+    except IOError:

+      raise newException(IOError, "Err2")

+

+when isMainModule:

+  foo()
\ No newline at end of file
diff --git a/tests/ccgbugs/t21995.nim b/tests/ccgbugs/t21995.nim
new file mode 100644
index 000000000..0ec88aa59
--- /dev/null
+++ b/tests/ccgbugs/t21995.nim
@@ -0,0 +1,9 @@
+discard """
+    targets: "c cpp"
+    output: "Hi!"
+"""
+
+try:
+  raise
+except:
+  echo "Hi!"
\ No newline at end of file
diff --git a/tests/ccgbugs/t22462.nim b/tests/ccgbugs/t22462.nim
new file mode 100644
index 000000000..9adfbb19b
--- /dev/null
+++ b/tests/ccgbugs/t22462.nim
@@ -0,0 +1,20 @@
+discard """
+  action: "run"
+  output: '''
+1
+1
+1
+'''
+  matrix: "--mm:refc"
+  targets: "c cpp"
+"""
+
+type Object = object
+  someComplexType: seq[int]
+  index: Natural
+
+func newObject(): Object = result.index.inc
+
+for i in 1..3:
+  let o = newObject()
+  echo o.index
diff --git a/tests/ccgbugs/t23796.nim b/tests/ccgbugs/t23796.nim
new file mode 100644
index 000000000..421ec04d8
--- /dev/null
+++ b/tests/ccgbugs/t23796.nim
@@ -0,0 +1,25 @@
+discard """
+    targets: "c cpp"
+"""
+
+# bug #23796
+
+{.emit: """
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void fooArr(float data[3]) {}
+void fooIntArr(int id, float data[3]) {}
+
+#ifdef __cplusplus
+}
+#endif
+""".}
+
+proc fooArr(data: var array[3, cfloat]) {.importc.}
+proc fooIntArr(id: cint, data: var array[3, cfloat]) {.importc, nodecl.}
+
+var arr = [cfloat 1, 2, 3]
+fooArr(arr)
+fooIntArr(1, arr)
diff --git a/tests/ccgbugs/t2procs.nim b/tests/ccgbugs/t2procs.nim
new file mode 100644
index 000000000..d8b7a2815
--- /dev/null
+++ b/tests/ccgbugs/t2procs.nim
@@ -0,0 +1,18 @@
+discard """
+  output: '''before
+1
+before
+2'''
+"""
+
+proc fn[T1, T2](a: T1, b: T2) =
+  a(1)
+  b(2)
+
+fn( (proc(x: int) =
+      echo "before" # example block, can span multiple lines
+      echo x),
+    (proc (y: int) =
+      echo "before"
+      echo y)
+)
diff --git a/tests/ccgbugs/t5296.nim b/tests/ccgbugs/t5296.nim
new file mode 100644
index 000000000..8fbed35c4
--- /dev/null
+++ b/tests/ccgbugs/t5296.nim
@@ -0,0 +1,21 @@
+discard """
+cmd: "nim c -d:release $file"
+output: '''1
+-1'''
+"""
+
+proc bug() : void =
+    var x = 0
+    try:
+        inc x
+        raise new(Exception)
+    except Exception:
+        echo x
+
+bug()
+
+# bug #19051
+type GInt[T] = int
+
+var a = 1
+echo -a
diff --git a/tests/ccgbugs/t5345.nim b/tests/ccgbugs/t5345.nim
new file mode 100644
index 000000000..f9ee833c4
--- /dev/null
+++ b/tests/ccgbugs/t5345.nim
@@ -0,0 +1,10 @@
+discard """
+  output: true
+"""
+
+proc cmpx(d: int): bool {.inline.} = d > 0
+
+proc abc[C](cx: C, d: int) =
+  echo cx(d)
+  
+abc(cmpx, 10)
diff --git a/tests/ccgbugs/t6279.nim b/tests/ccgbugs/t6279.nim
new file mode 100644
index 000000000..5a3d6768c
--- /dev/null
+++ b/tests/ccgbugs/t6279.nim
@@ -0,0 +1,9 @@
+discard """
+cmd: "nim c -r -d:fulldebug -d:smokeCycles --gc:refc $file"
+output: '''@["a"]'''
+"""
+
+# bug #6279
+var foo = newSeq[tuple[a: seq[string], b: seq[string]]]()
+foo.add((@["a"], @["b"]))
+echo foo[0].a # Crashes on this line
diff --git a/tests/ccgbugs/t6756.nim b/tests/ccgbugs/t6756.nim
new file mode 100644
index 000000000..5990eba58
--- /dev/null
+++ b/tests/ccgbugs/t6756.nim
@@ -0,0 +1,24 @@
+discard """
+output: '''
+(v: 3)
+'''
+"""
+
+import typetraits
+type
+  A[T] = ref object
+    v: T
+
+template templ(o: A, op: untyped): untyped =
+  type T = typeof(o.v)
+
+  var res: A[T]
+
+  block:
+    var it {.inject.}: T
+    it = o.v
+    res = A[T](v: op)
+  res
+
+let a = A[int](v: 1)
+echo templ(a, it + 2)[]
diff --git a/tests/ccgbugs/t7079.nim b/tests/ccgbugs/t7079.nim
new file mode 100644
index 000000000..bfa1b77a6
--- /dev/null
+++ b/tests/ccgbugs/t7079.nim
@@ -0,0 +1,9 @@
+discard """
+  action: run
+  targets: '''c js'''
+"""
+
+import math
+let x = -0.0
+doAssert classify(x) == fcNegZero
+doAssert classify(1 / -0.0) == fcNegInf
\ No newline at end of file
diff --git a/tests/ccgbugs/t8616.nim b/tests/ccgbugs/t8616.nim
new file mode 100644
index 000000000..5fd940d3b
--- /dev/null
+++ b/tests/ccgbugs/t8616.nim
@@ -0,0 +1,4 @@
+import pkg8616 / scheduler
+
+when true:
+  init()
diff --git a/tests/ccgbugs/t8781.nim b/tests/ccgbugs/t8781.nim
new file mode 100644
index 000000000..884c6962a
--- /dev/null
+++ b/tests/ccgbugs/t8781.nim
@@ -0,0 +1,25 @@
+discard """
+output: ""
+"""
+
+type
+  Drawable = object of RootObj
+    discard
+
+  # issue #8781, following type was broken due to 'U' suffix
+  # on `animatedU`. U also added as union identifier for C.
+  # replaced by "_U" prefix, which is not allowed as an
+  # identifier
+  TypeOne = ref object of Drawable
+    animatedU: bool
+    case animated: bool
+    of true:
+        frames: seq[int]
+    of false:
+        region: float
+
+when true:
+  let r = 1.5
+  let a = TypeOne(animatedU: true,
+                  animated: false,
+                  region: r)
diff --git a/tests/ccgbugs/t8967.nim b/tests/ccgbugs/t8967.nim
new file mode 100644
index 000000000..0301a2e4f
--- /dev/null
+++ b/tests/ccgbugs/t8967.nim
@@ -0,0 +1,14 @@
+discard """
+  targets: "c cpp"
+"""
+
+import marshal
+
+template main() =
+  let orig: set[char] = {'A'..'Z'}
+  let m = $$orig
+  let old = to[set[char]](m)
+  doAssert orig - old == {}
+
+static: main()
+main()
diff --git a/tests/ccgbugs/t9098.nim b/tests/ccgbugs/t9098.nim
new file mode 100644
index 000000000..e1dbb6883
--- /dev/null
+++ b/tests/ccgbugs/t9098.nim
@@ -0,0 +1,12 @@
+discard """
+  targets: "c cpp js"
+  output: '''
+{'a', 'b'}
+'''
+"""
+
+var x = new(ref set[char])
+var y = new(ref set[char])
+x[] = {'a'}
+y[] = {'b'}
+echo x[] + y[]
diff --git a/tests/ccgbugs/t9286.nim b/tests/ccgbugs/t9286.nim
new file mode 100644
index 000000000..2fec23307
--- /dev/null
+++ b/tests/ccgbugs/t9286.nim
@@ -0,0 +1,22 @@
+discard """
+  action: run
+"""
+
+import options
+type Foo  = ref object
+  i:      int
+
+proc next(foo: Foo): Option[Foo] =
+  try:    doAssert(foo.i == 0)
+  except: return      # 2º: none
+  return some(foo)    # 1º: some
+
+proc test =
+  let foo = Foo()
+  var opt = next(foo) # 1º Some
+  while isSome(opt) and foo.i < 10:
+    inc(foo.i)
+    opt = next(foo)   # 2º None
+  doAssert foo.i == 1, $foo.i
+
+test()
diff --git a/tests/ccgbugs/t9578.nim b/tests/ccgbugs/t9578.nim
new file mode 100644
index 000000000..25b7b6695
--- /dev/null
+++ b/tests/ccgbugs/t9578.nim
@@ -0,0 +1,76 @@
+discard """
+output: '''
+@[(v: -1), (v: 2), (v: 3)]
+@[(v: -1), (v: 2), (v: 3)]
+[(v: -1), (v: 2), (v: 3)]
+[(v: -1), (v: 2), (v: 3)]
+((v: -1), (v: 2), (v: 3))
+((v: -1), (v: 2), (v: 3))
+@[(v: -1), (v: 2), (v: 3)]
+@[(v: -1), (v: 2), (v: 3)]
+@[(v: -1), (v: 2), (v: 3)]
+'''
+"""
+
+type mytype* = object
+  v:int
+
+proc f*(x:ptr mytype) = x.v = -1
+
+func g(x:int):mytype = mytype(v:x)
+
+
+import xseq9578
+block:
+  var x = @[1.g,2.g,3.g]
+  testSeq(x)
+  echo x
+block:
+  var x = @[1.g,2.g,3.g]
+  var y = addr x
+  testSeq2(y)
+  echo x
+
+
+import xarray9578
+block:
+  var x = [1.g,2.g,3.g]
+  testArray(x)
+  echo x
+block:
+  var x = [1.g,2.g,3.g]
+  var y = addr x
+  testArray2(y)
+  echo x
+
+
+import xtuple9578
+block:
+  var x = (1.g,2.g,3.g)
+  testTuple(x)
+  echo x
+block:
+  var x = (1.g,2.g,3.g)
+  var y = addr x
+  testTuple2(y)
+  echo x
+
+
+import xoa9578
+block:
+  var x = @[1.g,2.g,3.g]
+  testOpenArray(x)
+  echo x
+
+
+import xua9578
+block:
+  var x = @[1.g,2.g,3.g]
+  var y = cast[ptr UncheckedArray[mytype]](addr x[0])
+  testUncheckedArray(y[])
+  echo x
+block:
+  var x = @[1.g,2.g,3.g]
+  var y = cast[ptr UncheckedArray[mytype]](addr x[0])
+  testUncheckedArray2(y)
+  echo x
diff --git a/tests/ccgbugs/t9655.nim b/tests/ccgbugs/t9655.nim
new file mode 100644
index 000000000..29fb903a4
--- /dev/null
+++ b/tests/ccgbugs/t9655.nim
@@ -0,0 +1,30 @@
+discard """
+  action: "compile"
+"""
+
+import std/[asynchttpserver, asyncdispatch]
+import std/[strformat]
+
+proc main() =
+  let local = "123"
+
+  proc serveIndex(req: Request) {.async, gcsafe.} =
+    await req.respond(Http200, &"{local}")
+
+  proc serve404(req: Request) {.async, gcsafe.} =
+    echo req.url.path
+    await req.respond(Http404, "not found")
+
+  proc serve(req: Request) {.async, gcsafe.} =
+    let handler = case req.url.path:
+      of "/":
+        serveIndex
+      else:
+        serve404
+    await handler(req)
+
+  let server = newAsyncHttpServer()
+  waitFor server.serve(Port(8080), serve, address = "127.0.0.1")
+
+when isMainModule:
+  main()
diff --git a/tests/ccgbugs/taddhigh.nim b/tests/ccgbugs/taddhigh.nim
new file mode 100644
index 000000000..6b0658612
--- /dev/null
+++ b/tests/ccgbugs/taddhigh.nim
@@ -0,0 +1,19 @@
+discard """
+  output: '''@[5, 5, 5, 5, 5]'''
+"""
+
+# bug #1832
+
+var s = @[5]
+
+# Works fine:
+let x = s[s.high]
+s.add x
+
+# Causes the 0 to appear:
+s.add s[s.high]
+
+s.add s[s.len-1]
+s.add s[s.len-1]
+
+echo s # @[5, 5, 0]
diff --git a/tests/ccgbugs/targ_lefttoright.nim b/tests/ccgbugs/targ_lefttoright.nim
new file mode 100644
index 000000000..a0adce157
--- /dev/null
+++ b/tests/ccgbugs/targ_lefttoright.nim
@@ -0,0 +1,71 @@
+discard """
+  nimout: '''1,2
+2,3
+2,2
+1,2
+1,2
+2,2
+1,2
+'''
+  output: '''1,2
+2,3
+1,2
+2,2
+1,2
+1,2
+2,2
+1,2
+'''
+  cmd: "nim c --gc:orc $file"
+"""
+
+template test =
+  proc say(a, b: int) =
+    echo a,",",b
+
+  var a = 1
+  say a, (a += 1; a) #1,2
+
+  var b = 1
+  say (b += 1; b), (b += 1; b) #2,3
+
+  type C {.byRef.} = object
+    i: int
+
+  proc say(a, b: C) =
+    echo a.i,",",b.i
+
+  proc `+=`(x: var C, y: C) = x.i += y.i
+
+  var c = C(i: 1)
+  when nimvm: #XXX: This would output 2,2 in the VM, which is wrong
+    discard
+  else:
+    say c, (c += C(i: 1); c) #1,2
+
+  proc sayVar(a: var int, b: int) =
+    echo a,",",b
+
+  var d = 1
+  sayVar d, (d += 1; d) #2,2
+
+  var e = 1
+  say (addr e)[], (e += 1; e) #1,2
+
+  var f = 1
+  say f, if false: f
+         else: f += 1; f #1,2
+
+  var g = 1
+  say g + 1, if false: g
+             else: g += 1; g #2,2
+
+  proc `+=+`(x: var int, y: int): int = (inc(x, y); x)
+
+  var h = 1
+  say h, h +=+ 1 # 1,2
+
+test
+
+static:
+  test
diff --git a/tests/ccgbugs/tarray_equality.nim b/tests/ccgbugs/tarray_equality.nim
new file mode 100644
index 000000000..66a953439
--- /dev/null
+++ b/tests/ccgbugs/tarray_equality.nim
@@ -0,0 +1,15 @@
+discard """
+  output: '''true
+true'''
+"""
+
+# bug #2489
+
+let a = [1]
+let b = [1]
+echo a == b
+
+# bug #2498
+var x: array[0, int]
+var y: array[0, int]
+echo x == y
diff --git a/tests/ccgbugs/tassign_nil_strings.nim b/tests/ccgbugs/tassign_nil_strings.nim
new file mode 100644
index 000000000..e32bfcade
--- /dev/null
+++ b/tests/ccgbugs/tassign_nil_strings.nim
@@ -0,0 +1,13 @@
+discard """
+  matrix: "--mm:refc"
+  output: "Hello"
+  ccodecheck: "\\i@'a = ((NimStringDesc*) NIM_NIL)'"
+"""
+
+proc main() =
+  var a = "Hello"
+  echo a
+  a = ""
+  doAssert a.len == 0
+
+main()
diff --git a/tests/ccgbugs/tborrowmagic.nim b/tests/ccgbugs/tborrowmagic.nim
new file mode 100644
index 000000000..8d42ddcd8
--- /dev/null
+++ b/tests/ccgbugs/tborrowmagic.nim
@@ -0,0 +1,8 @@
+type
+  Bytes = distinct seq[byte]
+
+proc add(x: var Bytes; b: byte) {.borrow.}
+var x = @[].Bytes
+x.add(42)
+let base = cast[seq[byte]](x)
+doAssert base.len == 1 and base[0] == 42
diff --git a/tests/ccgbugs/tbug1081.nim b/tests/ccgbugs/tbug1081.nim
new file mode 100644
index 000000000..baef99d84
--- /dev/null
+++ b/tests/ccgbugs/tbug1081.nim
@@ -0,0 +1,34 @@
+discard """
+  output: '''1
+0
+0
+0
+x = ['a', 'b', 'c', '0', '1', '2', '3', '4', '5', '6'] and y = ['a', 'b', 'c', '0', '1', '2', '3', '4', '5', '6']'''
+"""
+
+proc `1/1`() = echo(1 div 1)
+template `1/2`() = echo(1 div 2)
+var `1/3` = 1 div 4
+`1/3` = 1 div 3 # oops, 1/3!=1/4
+let `1/4` = 1 div 4
+
+`1/1`()
+`1/2`()
+echo `1/3`
+echo `1/4`
+
+# bug #6422
+
+proc toCharArray1(N : static[int], s: string): array[N, char] =
+  doAssert s.len <= N
+  let x = cast[ptr array[N, char]](s.cstring)
+  x[]
+
+proc toCharArray2(N : static[int], s: string): array[N, char] =
+  doAssert s.len <= N
+  let x = cast[ptr array[N, char]](s.cstring)
+  result = x[]
+
+let x = toCharArray1(10, "abc0123456")
+let y = toCharArray2(10, "abc0123456")
+echo "x = ", $x, " and y = ", $y
diff --git a/tests/ccgbugs/tbug21505.nim b/tests/ccgbugs/tbug21505.nim
new file mode 100644
index 000000000..0c0811ec5
--- /dev/null
+++ b/tests/ccgbugs/tbug21505.nim
@@ -0,0 +1,39 @@
+discard """
+    action: "compile"
+    targets: "cpp"
+    cmd: "nim cpp $file"
+"""
+
+# see #21505: ensure compilation of imported C++ objects with explicit constructors while retaining default initialization through codegen changes due to #21279
+
+{.emit:"""/*TYPESECTION*/
+
+struct ExplObj
+{
+  explicit ExplObj(int bar = 0) {}  
+};
+
+struct BareObj
+{
+    BareObj() {}
+};
+
+""".}
+
+type
+  ExplObj {.importcpp.} = object
+  BareObj {.importcpp.} = object
+
+type
+  Composer = object
+    explObj: ExplObj
+    bareObj: BareObj
+
+proc foo =
+  var composer1 {.used.}: Composer
+  let composer2 {.used.} = Composer()
+
+var composer1 {.used.}: Composer
+let composer2 {.used.} = Composer()
+
+foo()
\ No newline at end of file
diff --git a/tests/ccgbugs/tcapture_static.nim b/tests/ccgbugs/tcapture_static.nim
new file mode 100644
index 000000000..2afb8de47
--- /dev/null
+++ b/tests/ccgbugs/tcapture_static.nim
@@ -0,0 +1,13 @@
+discard """
+  output: '''hi'''
+"""
+
+# bug #4551
+
+proc foo() =
+    let arr = ["hi"]
+    for i, v in arr:
+        let bar = proc =
+            echo v
+        bar()
+foo()
diff --git a/tests/ccgbugs/tccgen1.nim b/tests/ccgbugs/tccgen1.nim
new file mode 100644
index 000000000..be571de08
--- /dev/null
+++ b/tests/ccgbugs/tccgen1.nim
@@ -0,0 +1,67 @@
+
+
+type
+  Feature = tuple[name: string, version: string]
+  PDOMImplementation* = ref DOMImplementation
+  DOMImplementation = object
+    Features: seq[Feature] # Read-Only
+
+  PNode* = ref Node
+  Node {.inheritable.} = object
+    attributes*: seq[PAttr]
+    childNodes*: seq[PNode]
+    FLocalName: string # Read-only
+    FNamespaceURI: string # Read-only
+    FNodeName: string # Read-only
+    nodeValue*: string
+    FNodeType: int # Read-only
+    FOwnerDocument: PDocument # Read-Only
+    FParentNode: PNode # Read-Only
+    prefix*: string # Setting this should change some values... TODO!
+
+  PElement* = ref Element
+  Element = object of Node
+    FTagName: string # Read-only
+
+  PCharacterData = ref CharacterData
+  CharacterData = object of Node
+    data*: string
+
+  PDocument* = ref Document
+  Document = object of Node
+    FImplementation: PDOMImplementation # Read-only
+    FDocumentElement: PElement # Read-only
+
+  PAttr* = ref Attr
+  Attr = object of Node
+    FName: string # Read-only
+    FSpecified: bool # Read-only
+    value*: string
+    FOwnerElement: PElement # Read-only
+
+  PDocumentFragment* = ref DocumentFragment
+  DocumentFragment = object of Node
+
+  PText* = ref Text
+  Text = object of CharacterData
+
+  PComment* = ref Comment
+  Comment = object of CharacterData
+
+  PCDataSection* = ref CDataSection
+  CDataSection = object of Text
+
+  PProcessingInstruction* = ref ProcessingInstruction
+  ProcessingInstruction = object of Node
+    data*: string
+    FTarget: string # Read-only
+
+proc `namespaceURI=`*(n: var PNode, value: string) =
+  n.FNamespaceURI = value
+
+proc main =
+  var n: PNode
+  new(n)
+  n.namespaceURI = "test"
+
+main()
diff --git a/tests/ccgbugs/tccgissues.nim b/tests/ccgbugs/tccgissues.nim
new file mode 100644
index 000000000..8207ccbba
--- /dev/null
+++ b/tests/ccgbugs/tccgissues.nim
@@ -0,0 +1,14 @@
+discard """
+  output: '''
+@[1, 2, 3, 4]
+'''
+"""
+
+# issue #10999
+
+proc varargsToSeq(vals: varargs[int32]): seq[int32] =
+  result = newSeqOfCap[int32](vals.len)
+  for v in vals:
+    result.add v
+
+echo varargsToSeq(1, 2, 3, 4)
diff --git a/tests/ccgbugs/tcgbug.nim b/tests/ccgbugs/tcgbug.nim
new file mode 100644
index 000000000..2eddc6fdd
--- /dev/null
+++ b/tests/ccgbugs/tcgbug.nim
@@ -0,0 +1,163 @@
+discard """
+output: '''
+success
+M1 M2
+ok
+'''
+matrix: "--mm:refc;--mm:orc"
+"""
+
+type
+  TObj = object
+    x, y: int
+  PObj = ref TObj
+
+proc p(a: PObj) =
+  a.x = 0
+
+proc q(a: var PObj) =
+  a.p()
+
+var
+  a: PObj
+new(a)
+q(a)
+
+# bug #914
+when defined(windows):
+  import std/widestrs
+  var x = newWideCString("Hello")
+
+echo "success"
+
+
+# bug #833
+
+type
+  PFuture*[T] = ref object
+    value*: T
+    finished*: bool
+    cb: proc (future: PFuture[T]) {.closure.}
+
+var k = PFuture[void]()
+
+
+##bug #9297 and #13281
+
+import strutils
+
+type
+  MyKind = enum
+    M1, M2, M3
+
+  MyObject {.exportc: "ExtObject"} = object
+    case kind: MyKind
+      of M1: a:int
+      of M2: b:float
+      of M3: c:cstring
+
+  MyObjectRef {.exportc: "ExtObject2"} = ref object
+    case kind: MyKind
+      of M1: a:int
+      of M2: b:float
+      of M3: c:cstring
+
+  Helper* {.exportc: "PublicHelper".} = object
+    case isKind: bool
+      of true:
+        formatted: string
+      of false:
+        parsed1: string
+        parsed2: string
+
+proc newMyObject(kind: MyKind, val: string): MyObject =
+  result = MyObject(kind: kind)
+
+  case kind
+    of M1: result.a = parseInt(val)
+    of M2: result.b = parseFloat(val)
+    of M3: result.c = val
+
+proc newMyObjectRef(kind: MyKind, val: string): MyObjectRef =
+  result = MyObjectRef(kind: kind)
+  case kind
+    of M1: result.a = parseInt(val)
+    of M2: result.b = parseFloat(val)
+    of M3: result.c = val
+
+
+echo newMyObject(M1, "2").kind, " ", newMyObjectRef(M2, "3").kind
+
+
+proc test(c: Helper): string =
+  c.formatted
+
+echo test(Helper(isKind: true, formatted: "ok"))
+
+
+# bug #19613
+
+type
+  Eth2Digest = object
+    data: array[42, byte]
+
+  BlockId* = object
+    root*: Eth2Digest
+
+  BlockSlotId* = object
+    bid*: BlockId
+    slot*: uint64
+
+func init*(T: type BlockSlotId, bid: BlockId, slot: uint64): T =
+  #debugecho "init ", bid, " ", slot
+  BlockSlotId(bid: bid, slot: slot)
+
+proc bug19613 =
+  var x: BlockSlotId
+  x.bid.root.data[0] = 42
+
+  x =
+    if x.slot > 0:
+      BlockSlotId.init(x.bid, x.slot)
+    else:
+      BlockSlotId.init(x.bid, x.slot)
+  doAssert x.bid.root.data[0] == 42
+
+bug19613()
+
+proc foo = # bug #23280
+  let foo = @[1,2,3,4,5,6]
+  doAssert toOpenArray(foo, 0, 5).len == 6
+  doAssert toOpenArray(foo, 0, 5).len mod 6 == 0 # this should output 0
+  doAssert toOpenArray(foo, 0, 5).max mod 6 == 0
+  let L = toOpenArray(foo, 0, 5).len
+  doAssert L mod 6 == 0 
+
+foo()
+
+block: # bug #9940
+  {.emit:"""/*TYPESECTION*/
+typedef struct { int base; } S;
+""".}
+
+  type S {.importc: "S", completeStruct.} = object
+    base: cint
+  proc init(x:ptr S) =
+    x.base = 1
+
+  type
+    Foo = object
+      a: seq[float]
+      b: seq[float]
+      c: seq[float]
+      d: seq[float]
+      s: S
+
+  proc newT(): Foo =
+    var t: Foo
+    t.s.addr.init
+    doAssert t.s.base == 1
+    t
+
+  var t = newT()
+  doAssert t.s.base == 1
diff --git a/tests/ccgbugs/tclosureeq.nim b/tests/ccgbugs/tclosureeq.nim
new file mode 100644
index 000000000..0486a9559
--- /dev/null
+++ b/tests/ccgbugs/tclosureeq.nim
@@ -0,0 +1,19 @@
+discard """
+  output: '''true
+true'''
+"""
+
+# bug #4186
+type
+  Predicate[T] = proc(item: T): bool
+
+proc a[T](): Predicate[T] =
+  return nil
+
+proc b[T](): Predicate[T] =
+  return a[T]()
+
+echo b[int]() == nil  # ok
+
+let x = b[int]()
+echo x == nil     #won't compile
diff --git a/tests/ccgbugs/tcodegenbug1.nim b/tests/ccgbugs/tcodegenbug1.nim
new file mode 100644
index 000000000..d2ab97ede
--- /dev/null
+++ b/tests/ccgbugs/tcodegenbug1.nim
@@ -0,0 +1,185 @@
+discard """
+  matrix: "--mm:refc"
+  output: '''obj = (inner: (kind: Just, id: 7))
+obj.inner.id = 7
+id = 7
+obj = (inner: (kind: Just, id: 7))
+2
+(a: "a", b: "b", c: "")
+caught
+(a: "a", b: "b", c: "")'''
+"""
+
+# bug #6960
+
+import sugar
+type
+  Kind = enum None, Just, Huge
+  Inner = object
+    case kind: Kind
+    of None: discard
+    of Just: id: int
+    of Huge: a,b,c,d,e,f: string
+  Outer = object
+    inner: Inner
+
+
+proc shouldDoNothing(id: int): Inner =
+  dump id
+  Inner(kind: Just, id: id)
+
+var obj = Outer(inner: Inner(kind: Just, id: 7))
+dump obj
+dump obj.inner.id
+obj.inner = shouldDoNothing(obj.inner.id)
+dump obj
+
+import os
+
+type
+  TStatusEnum* = enum
+    sUnknown = -1, sBuildFailure, sBuildInProgress, sBuildSuccess,
+    sTestFailure, sTestInProgress, sTestSuccess, # ORDER MATTERS!
+    sDocGenFailure, sDocGenInProgress, sDocGenSuccess,
+    sCSrcGenFailure, sCSrcGenInProgress, sCSrcGenSuccess
+
+  TStatus* = object
+    status*: TStatusEnum
+    desc*: string
+    hash*: string
+
+proc initStatus*(): TStatus =
+  result.status = sUnknown
+  result.desc = ""
+  result.hash = ""
+
+proc isInProgress*(status: TStatusEnum): bool =
+  return status in {sBuildInProgress, sTestInProgress, sDocGenInProgress,
+                    sCSrcGenInProgress}
+
+proc `$`*(status: TStatusEnum): string =
+  case status
+  of sBuildFailure:
+    return "build failure"
+  of sBuildInProgress:
+    return "build in progress"
+  of sBuildSuccess:
+    return "build finished"
+  of sTestFailure:
+    return "testing failure"
+  of sTestInProgress:
+    return "testing in progress"
+  of sTestSuccess:
+    return "testing finished"
+  of sDocGenFailure:
+    return "documentation generation failed"
+  of sDocGenInProgress:
+    return "generating documentation"
+  of sDocGenSuccess:
+    return "documentation generation succeeded"
+  of sCSrcGenFailure:
+    return "csource generation failed"
+  of sCSrcGenInProgress:
+    return "csource generation in progress"
+  of sCSrcGenSuccess:
+    return "csource generation succeeded"
+  of sUnknown:
+    return "unknown"
+
+proc makeCommitPath*(platform, hash: string): string =
+  return platform / "nim_" & hash.substr(0, 11) # 11 Chars.
+
+type
+  TFlag = enum
+    A, B, C, D
+
+  TFlags = set[TFlag]
+
+  TObj = object
+    x: int
+    flags: TFlags
+
+# have a proc taking TFlags as param and returning object having TFlags field
+proc foo(flags: TFlags): TObj = nil
+
+
+# bug #5137
+type
+  MyInt {.importc: "int".} = object
+  MyIntDistinct = distinct MyInt
+
+proc bug5137(d: MyIntDistinct) =
+  discard d.MyInt
+
+#-------------------------------------
+# bug #8979
+
+type
+  MyKind = enum
+    Fixed, Float
+
+  MyObject = object
+    someInt: int
+    case kind: MyKind
+      of Float: index: string
+      of Fixed: nil
+
+  MyResult = object
+    val: array[0..1, string]
+    vis: set[0..1]
+
+import macros
+
+func myfunc(obj: MyObject): MyResult {.raises: [].} =
+  template index: auto =
+    case obj.kind:
+      of Float: $obj.index
+      of Fixed: "Fixed"
+  macro to_str(a: untyped): string =
+    result = newStrLitNode(a.repr)
+  result.val[0] = index
+  result.val[1] = to_str(obj.kind + Ola)
+
+let x = MyObject(someInt: 10, kind: Fixed)
+echo myfunc(x).val.len
+
+# bug #14126
+
+type X = object
+  a, b, c: string
+
+proc f(): X =
+  result.a = "a"
+  result.b = "b"
+  raise (ref ValueError)()
+
+proc ohmanNoNRVO =
+  var x: X
+  x.a = "1"
+  x.b = "2"
+  x.c = "3"
+
+  try:
+    x = f()
+  except:
+    discard
+
+  echo x
+  # once NVRO is sorted out, x.c == "3"
+  doAssert x.c == "", "shouldn't modify x if f raises"
+
+ohmanNoNRVO()
+
+proc ohmanNoNRVO2(x: var X) =
+  x.a = "1"
+  x.c = "3"
+  x = f()
+
+var xgg: X
+try:
+  ohmanNoNRVO2(xgg)
+except:
+  echo "caught"
+echo xgg
+# once NVRO is sorted out, xgg.c == "3"
+doAssert xgg.c == "", "this assert will fail"
diff --git a/tests/ccgbugs/tcodegenbug_bool.nim b/tests/ccgbugs/tcodegenbug_bool.nim
new file mode 100644
index 000000000..a0dbf4eb2
--- /dev/null
+++ b/tests/ccgbugs/tcodegenbug_bool.nim
@@ -0,0 +1,11 @@
+discard """
+"""
+
+# issue #13798
+{.emit:"""
+#include <stdbool.h>
+void fun(bool a){}
+""".}
+
+proc fun(a: bool) {.importc.}
+fun(true)
diff --git a/tests/ccgbugs/tcodegendecllambda.nim b/tests/ccgbugs/tcodegendecllambda.nim
new file mode 100644
index 000000000..814dcf206
--- /dev/null
+++ b/tests/ccgbugs/tcodegendecllambda.nim
@@ -0,0 +1,14 @@
+discard """
+  targets: "c cpp js"
+  ccodecheck: "'HELLO'"
+  action: compile
+"""
+
+when defined(js):
+  var foo = proc(): void{.codegenDecl: "/*HELLO*/function $2($3)".} =
+    echo "baa"
+else:
+  var foo = proc(): void{.codegenDecl: "/*HELLO*/$1 $2 $3".} =
+    echo "baa"
+
+foo()
diff --git a/tests/ccgbugs/tcompile_time_var_at_runtime.nim b/tests/ccgbugs/tcompile_time_var_at_runtime.nim
new file mode 100644
index 000000000..c0de0390b
--- /dev/null
+++ b/tests/ccgbugs/tcompile_time_var_at_runtime.nim
@@ -0,0 +1,11 @@
+discard """
+  output: "1\n2\n2\n3"
+"""
+var a {.compileTime.} = 1
+
+echo a
+a = 2
+echo a
+echo a
+a = 3
+echo a 
\ No newline at end of file
diff --git a/tests/ccgbugs/tctypes.nim b/tests/ccgbugs/tctypes.nim
new file mode 100644
index 000000000..be6009115
--- /dev/null
+++ b/tests/ccgbugs/tctypes.nim
@@ -0,0 +1,43 @@
+discard """
+  targets: "c cpp"
+  matrix: "--gc:refc; --gc:arc"
+"""
+
+# bug #7308
+proc foo(x: seq[int32]) =
+  var y = newSeq[cint](1)
+
+proc bar =
+  var t = newSeq[int32](1)
+  foo(t)
+
+bar()
+
+
+# bug #16246
+
+proc testWeirdTypeAliases() =
+  var values = newSeq[cuint](8)
+  # var values: seq[cuint] does not produce codegen error
+  var drawCb = proc(): seq[uint32] =
+    result = newSeq[uint32](10)
+
+testWeirdTypeAliases()
+
+block: # bug #11797
+  block:
+    type cdouble2 = cdouble
+    type Foo1 = seq[cdouble]
+    type Foo2 = seq[cdouble2]
+    static: doAssert Foo1 is Foo2
+    var a1: Foo1
+    var a2: Foo2
+    doAssert a1 == @[]
+    doAssert a2 == @[]
+
+  block:
+    proc foo[T: int|cint](fun: proc(): T) = discard
+    proc foo1(): cint = 1
+    proc foo3(): int32 = 2
+    foo(proc(): cint = foo1())
+    foo(proc(): int32 = foo3())
diff --git a/tests/ccgbugs/tcvarargs.nim b/tests/ccgbugs/tcvarargs.nim
new file mode 100644
index 000000000..261885f4f
--- /dev/null
+++ b/tests/ccgbugs/tcvarargs.nim
@@ -0,0 +1,35 @@
+discard """
+  output: '''17
+17
+17
+17
+17
+17
+'''
+"""
+
+# bug #1593
+
+{.emit: """
+#include <stdarg.h>
+#include <stdio.h>
+
+void foo(int n, ...) {
+  NI64 k;
+  int i;
+  va_list argp;
+  va_start(argp, n);
+  for (i = 1; i <= n; i++) {
+    k = va_arg(argp, NI64);
+    printf("%lld\n", (long long)k);
+  }
+  va_end(argp);
+}
+""".}
+
+proc foo(x: cint) {.importc, varargs, nodecl.}
+
+proc main() =
+  const k = 17'i64
+  foo(6, k, k, k, k, k, k)
+main()
diff --git a/tests/ccgbugs/tdeepcopy_addr_rval.nim b/tests/ccgbugs/tdeepcopy_addr_rval.nim
new file mode 100644
index 000000000..4a0b0deaa
--- /dev/null
+++ b/tests/ccgbugs/tdeepcopy_addr_rval.nim
@@ -0,0 +1,17 @@
+discard """
+  matrix: "--mm:refc; --mm:orc --deepcopy:on"
+  output: "3"
+"""
+
+# issue 5166
+
+type
+  Test = ref object
+    x: int
+
+let x = Test(x: 3)
+let p = cast[pointer](x)
+
+var v: Test
+deepCopy(v, cast[Test](p))
+echo v.x
diff --git a/tests/ccgbugs/tderefblock.nim b/tests/ccgbugs/tderefblock.nim
new file mode 100644
index 000000000..d3ba07667
--- /dev/null
+++ b/tests/ccgbugs/tderefblock.nim
@@ -0,0 +1,76 @@
+discard """
+  matrix: "--mm:refc -d:release -d:danger;--mm:orc -d:useMalloc -d:release -d:danger"
+  output: "42"
+"""
+
+# bug #20107
+
+type Foo = object
+  a, b, c, d: uint64
+
+proc c(i: uint64): Foo =
+  Foo(a: i, b: i, c: i, d: i)
+
+func x(f: Foo): lent Foo {.inline.} =
+  f
+
+proc m() =
+  let f = block:
+    let i = c(42)
+    x(i)
+
+  echo $f.a
+
+m()
+
+block: # bug #21540
+  type
+    Option = object
+      val: string
+      has: bool
+
+  proc some(val: string): Option =
+    result.has = true
+    result.val = val
+
+  # Remove lent and it works
+  proc get(self: Option): lent string =
+    result = self.val
+
+  type
+    StringStream = ref object
+      data: string
+      pos: int
+
+  proc readAll(s: StringStream): string =
+    result = newString(s.data.len)
+    copyMem(addr(result[0]), addr(s.data[0]), s.data.len)
+
+  proc newStringStream(s: string = ""): StringStream =
+    new(result)
+    result.data = s
+
+  proc parseJson(s: string): string =
+    let stream = newStringStream(s)
+    result = stream.readAll()
+
+  proc main =
+    let initialFEN = block:
+      let initialFEN = some parseJson("startpos")
+      initialFEN.get
+
+    doAssert initialFEN == "startpos"
+
+  main()
+
+import std/[
+    json,
+    options
+]
+
+block: # bug #21540
+  let cheek = block:
+    let initialFEN = some("""{"initialFen": "startpos"}""".parseJson{"initialFen"}.getStr)
+    initialFEN.get
+
+  doAssert cheek == "startpos"
diff --git a/tests/ccgbugs/tescaping_temps.nim b/tests/ccgbugs/tescaping_temps.nim
new file mode 100644
index 000000000..ea09261ea
--- /dev/null
+++ b/tests/ccgbugs/tescaping_temps.nim
@@ -0,0 +1,31 @@
+
+# bug #4505
+
+proc f(t: tuple[]) = discard
+f((block: ()))
+
+# bug #4230
+# If we make `test` function return nothing - the bug disappears
+proc test(dothejob: proc()): int {.discardable.} =
+    dothejob()
+
+test proc() =
+    let f = 15
+    if f > 10:
+        test proc() = discard
+    # If we remove elif branch of the condition - the bug disappears
+    elif f < 3:
+        test proc() = discard
+    else:
+        test proc() = discard
+
+# ensure 'case' does not trigger the same bug:
+test proc() =
+    let f = 15
+    case f
+    of 10:
+        test proc() = discard
+    of 3:
+        test proc() = discard
+    else:
+        test proc() = discard
diff --git a/tests/ccgbugs/tforward_decl_only.nim b/tests/ccgbugs/tforward_decl_only.nim
new file mode 100644
index 000000000..b115dcbe7
--- /dev/null
+++ b/tests/ccgbugs/tforward_decl_only.nim
@@ -0,0 +1,34 @@
+discard """
+ccodecheck: "\\i !@('struct tyObject_MyRefObject'[0-z]+' _')"
+output: "hello"
+"""
+
+# issue #7339 
+# Test that MyRefObject is only forward declared as it used only by reference
+
+import mymodule
+type AnotherType = object
+  f: MyRefObject 
+
+let x = AnotherType(f: newMyRefObject("hello"))
+echo $x.f
+
+
+# bug #7363
+
+type 
+  Foo = object
+    a: cint
+  Foo2 = object
+    b: cint
+
+proc f(foo: ptr Foo, foo2: ptr Foo2): cint =
+  if foo  != nil:  {.emit: "`result` = `foo`->a;".}
+  if foo2 != nil: {.emit: [result, " = ", foo2[], ".b;"].}
+
+discard f(nil, nil)
+
+
+# bug #7392
+var x1: BaseObj
+var x2 = ChildObj(x1)
diff --git a/tests/ccgbugs/tgeneric_closure.nim b/tests/ccgbugs/tgeneric_closure.nim
new file mode 100644
index 000000000..9f3c5b446
--- /dev/null
+++ b/tests/ccgbugs/tgeneric_closure.nim
@@ -0,0 +1,34 @@
+discard """
+output: '''
+2
+2
+2
+'''
+"""
+
+# bug 2659
+
+type
+  GenProcType[T,U] = proc(x:T, y:var U)
+  IntProcType = proc(x:int, y:var int)
+
+proc mult(x:int, y:var int) =
+  y = 2 * x
+
+when true:
+
+  var input = 1
+  var output = 0
+
+  var someIntProc:IntProcType = mult
+  var someGenProc:GenProcType[int,int] = mult
+
+  mult(input, output)
+  echo output
+
+  someIntProc(input, output)
+  echo output
+
+  # Uncommenting causes an error in the C compiler.
+  someGenProc(input, output)
+  echo output
diff --git a/tests/ccgbugs/tgeneric_smallobj_asgn_opt.nim b/tests/ccgbugs/tgeneric_smallobj_asgn_opt.nim
new file mode 100644
index 000000000..3788b9985
--- /dev/null
+++ b/tests/ccgbugs/tgeneric_smallobj_asgn_opt.nim
@@ -0,0 +1,27 @@
+discard """
+  output: "done generic smallobj asgn opt"
+"""
+
+# bug #5402
+
+import lists
+
+type
+  Container[T] = ref object
+    obj: T
+
+  ListOfContainers[T] = ref object
+    list: DoublyLinkedList[Container[T]]
+
+proc contains[T](this: ListOfContainers[T], obj: T): bool =
+  for item in this.list.items():
+    if item.obj == obj: return true
+  return false
+
+proc newListOfContainers[T](): ListOfContainers[T] =
+  new(result)
+  result.list = initDoublyLinkedList[Container[T]]()
+
+let q = newListOfContainers[int64]()
+if not q.contains(123):
+  echo "done generic smallobj asgn opt"
diff --git a/tests/ccgbugs/thtiobj.nim b/tests/ccgbugs/thtiobj.nim
new file mode 100644
index 000000000..6db24dad0
--- /dev/null
+++ b/tests/ccgbugs/thtiobj.nim
@@ -0,0 +1,9 @@
+discard """
+  matrix: "--mm:refc"
+  targets: "c cpp"
+"""
+
+import typeinfo
+
+var x = ""
+discard (getPointer(toAny(x)))
diff --git a/tests/ccgbugs/tissues.nim b/tests/ccgbugs/tissues.nim
new file mode 100644
index 000000000..a0c402cc0
--- /dev/null
+++ b/tests/ccgbugs/tissues.nim
@@ -0,0 +1,38 @@
+discard """
+action: compile
+"""
+
+# bug #2233
+type MalType = object
+  fun: proc: MalType
+
+proc f(x: proc: MalType) =
+  discard x()
+
+f(nil)
+
+# bug #2823
+
+type A = object #of RootObj <-- Uncomment this to get no errors
+  test: proc(i: A): bool
+var a: proc(i: A): bool # Or comment this line to get no errors
+
+
+# bug #2703
+type
+  fooObj[T] = object of RootObj
+  bazObj[T] = object of fooObj[T]
+    x: T
+
+var troz: fooObj[string]
+echo bazObj[string](troz).x
+
+
+# bug #14880
+type step = object
+  exec: proc ()
+
+const pipeline = @[step()]
+
+let crash = pipeline[0]
+
diff --git a/tests/ccgbugs/tlvalueconv.nim b/tests/ccgbugs/tlvalueconv.nim
new file mode 100644
index 000000000..b2cb11eef
--- /dev/null
+++ b/tests/ccgbugs/tlvalueconv.nim
@@ -0,0 +1,32 @@
+discard """
+  matrix: "--gc:refc; --gc:arc"
+"""
+
+# bug #14160
+
+type
+  TPassContext = object of RootObj
+  PPassContext = ref TPassContext
+
+  PCtx = ref object of TPassContext
+    a: int
+
+  ModuleGraph = object
+    vm: RootRef
+
+proc main() =
+  var g = ModuleGraph(vm: new(Pctx))
+  PCtx(g.vm) = nil #This generates invalid C code
+  doAssert g.vm == nil
+
+main()
+
+# bug #14325
+
+proc main2() =
+  var g = ModuleGraph(vm: new(Pctx))
+  PPassContext(PCtx(g.vm)) = nil #This compiles, but crashes at runtime with gc:arc
+  doAssert g.vm == nil
+
+main2()
+
diff --git a/tests/ccgbugs/tmangle.nim b/tests/ccgbugs/tmangle.nim
new file mode 100644
index 000000000..0050cef92
--- /dev/null
+++ b/tests/ccgbugs/tmangle.nim
@@ -0,0 +1,16 @@
+block:
+  proc hello() =
+    let NAN_INFINITY = 12
+    doAssert NAN_INFINITY == 12
+    let INF = "2.0"
+    doAssert INF == "2.0"
+    let NAN = 2.3
+    doAssert NAN == 2.3
+
+  hello()
+
+block:
+  proc hello(NAN: float) =
+    doAssert NAN == 2.0
+
+  hello(2.0)
diff --git a/tests/ccgbugs/tmangle_field.nim b/tests/ccgbugs/tmangle_field.nim
new file mode 100644
index 000000000..da2720aaa
--- /dev/null
+++ b/tests/ccgbugs/tmangle_field.nim
@@ -0,0 +1,16 @@
+discard """
+"""
+
+# bug #5404
+
+import parseopt
+
+{.emit: """typedef struct {
+    int key;
+} foo;""".}
+
+type foo* {.importc: "foo", nodecl.} = object
+  key* {.importc: "key".}: cint
+
+for kind, key, value in parseopt.getopt():
+  discard
diff --git a/tests/ccgbugs/tmarkerproc_regression.nim b/tests/ccgbugs/tmarkerproc_regression.nim
new file mode 100644
index 000000000..3b606b834
--- /dev/null
+++ b/tests/ccgbugs/tmarkerproc_regression.nim
@@ -0,0 +1,47 @@
+discard """
+  output: "done markerproc regression"
+"""
+
+type
+  Version* = distinct string
+  Special* = distinct string
+
+  VersionRangeEnum* = enum
+    verLater, # > V
+    verEarlier, # < V
+    verEqLater, # >= V -- Equal or later
+    verEqEarlier, # <= V -- Equal or earlier
+    verIntersect, # > V & < V
+    verEq, # V
+    verAny, # *
+    verSpecial # #head
+
+  VersionRange* = ref VersionRangeObj
+  VersionRangeObj = object
+    case kind*: VersionRangeEnum
+    of verLater, verEarlier, verEqLater, verEqEarlier, verEq:
+      ver*: Version
+    of verSpecial:
+      spe*: Special
+    of verIntersect:
+      verILeft, verIRight: VersionRange
+    of verAny:
+      nil
+
+proc foo(x: string): VersionRange =
+  new(result)
+  result.kind = verEq
+  result.ver = Version(x)
+
+proc main =
+  var a: array[500, VersionRange]
+  for i in 0 ..< 500:
+    a[i] = foo($i & "some longer text here " & $i)
+  GC_fullcollect()
+  for i in 0 ..< 500:
+    let expected = $i & "some longer text here " & $i
+    if a[i].ver.string != expected:
+      quit "bug!"
+  echo "done markerproc regression"
+
+main()
diff --git a/tests/ccgbugs/tmissing_ccgtrav_unique_type.nim b/tests/ccgbugs/tmissing_ccgtrav_unique_type.nim
new file mode 100644
index 000000000..cb87eabd8
--- /dev/null
+++ b/tests/ccgbugs/tmissing_ccgtrav_unique_type.nim
@@ -0,0 +1,12 @@
+
+# bug #3794
+
+
+import options
+
+proc getRef*(): Option[int] =
+  return none(int)
+
+proc getChild*() =
+  let iter = iterator (): int {.closure.} =
+    let reference = getRef()
diff --git a/tests/ccgbugs/tmissingbracket.nim b/tests/ccgbugs/tmissingbracket.nim
new file mode 100644
index 000000000..2919efe0e
--- /dev/null
+++ b/tests/ccgbugs/tmissingbracket.nim
@@ -0,0 +1,53 @@
+discard """
+output: '''
+Subobject test called
+5
+'''
+"""
+
+type
+  TClassOfTCustomObject {.pure, inheritable.} = object
+    base* : ptr TClassOfTCustomObject
+    className* : string
+  TClassOfTobj = object of TClassOfTCustomObject
+    nil
+  TCustomObject {.inheritable.} = ref object
+    class* : ptr TClassOfTCustomObject
+  TObj = ref object of TCustomObject
+    data: int
+
+var ClassOfTObj: TClassOfTObj
+
+proc initClassOfTObj() =
+  ClassOfTObj.base = nil
+  ClassOfTObj.className = "TObj"
+
+initClassOfTObj()
+
+proc initialize*(self: TObj) =
+  self.class = addr ClassOfTObj
+  # this generates wrong C code: && instead of &
+
+proc newInstance(T: typedesc): T =
+  mixin initialize
+  new(result)
+  initialize(result)
+
+var o = TObj.newInstance()
+
+type
+    TestObj* = object of RootObj
+        t:int
+    SubObject* = object of TestObj
+
+method test*(t:var TestObj) {.base.} =
+    echo "test called"
+
+method test*(t:var SubObject) =
+    echo "Subobject test called"
+    t.t= 5
+
+var a: SubObject
+
+a.test()
+echo a.t
diff --git a/tests/ccgbugs/tmissingderef.nim b/tests/ccgbugs/tmissingderef.nim
new file mode 100644
index 000000000..eb7da3023
--- /dev/null
+++ b/tests/ccgbugs/tmissingderef.nim
@@ -0,0 +1,40 @@
+discard """
+  output: '''[10, 0, 0, 0, 0, 0, 0, 0]
+255
+1 1
+0.5'''
+"""
+
+# bug #1181
+
+type
+  TFoo = object
+    x: int32
+
+proc mainowar =
+  var foo: TFoo
+  foo.x = 0xff
+  var arr1 = cast[ptr array[4, uint8]](addr foo)[] # Fails.
+  echo arr1[when cpuEndian == littleEndian: 0 else: 3]
+
+  var i = 1i32
+  let x = addr i
+  var arr2 = cast[ptr array[4, uint8]](x)[] # Fails.
+  echo arr2[when cpuEndian == littleEndian: 0 else: 3], " ", i
+
+  # bug #1715
+  var a: array[2, float32] = [0.5'f32, 0.7]
+  let p = addr a
+  var b = p[]
+  echo b[0]
+
+
+# bug 2963
+var
+  a = [8, 7, 3, 10, 0, 0, 0, 1]
+  b = [10, 0, 0, 0, 0, 0, 0, 0]
+  ap = addr a
+ap[] = b
+echo repr(a)
+
+mainowar()
diff --git a/tests/ccgbugs/tmissingderef2.nim b/tests/ccgbugs/tmissingderef2.nim
new file mode 100644
index 000000000..23be61bcb
--- /dev/null
+++ b/tests/ccgbugs/tmissingderef2.nim
@@ -0,0 +1,25 @@
+discard """
+  output: "c"
+"""
+
+# bug #5079
+
+import tables
+
+type Test = ref object
+  s: string
+
+proc `test=`(t: Test, s: string) =
+  t.s = s
+
+var t = Test()
+
+#t.test = spaces(2) # -- works
+
+var a = newTable[string, string]()
+a["b"] = "c"
+
+#t.s = a["b"] # -- works
+#t.test a["b"] # -- works
+t.test = a["b"] # -- prints "out of memory" and quits
+echo t.s
diff --git a/tests/ccgbugs/tmissinginit.nim b/tests/ccgbugs/tmissinginit.nim
new file mode 100644
index 000000000..9eb58221c
--- /dev/null
+++ b/tests/ccgbugs/tmissinginit.nim
@@ -0,0 +1,31 @@
+discard """
+  matrix: "--mm:refc"
+  output: '''0
+0
+0
+0
+[[a = "",
+b = []]]'''
+"""
+
+# bug #1475
+type
+  Crash = object
+    a: string
+    b: seq[string]
+
+proc initCrash(): Crash = discard
+
+proc test() =
+  var blongname = [initCrash()]
+  echo repr(blongname)
+
+# bug #1434
+proc bug: array[1, int] = discard
+
+echo bug()[0]
+echo bug()[0]
+echo bug()[0]
+echo bug()[0]
+
+test()
diff --git a/tests/ccgbugs/tmissingvolatile.nim b/tests/ccgbugs/tmissingvolatile.nim
new file mode 100644
index 000000000..b877eff71
--- /dev/null
+++ b/tests/ccgbugs/tmissingvolatile.nim
@@ -0,0 +1,21 @@
+discard """
+  output: "1"
+  cmd: r"nim c --hints:on $options --mm:refc -d:release $file"
+  ccodecheck: "'NI volatile state;'"
+  targets: "c"
+"""
+
+# bug #1539
+
+proc err() =
+  raise newException(Exception, "test")
+
+proc main() =
+  var state: int
+  try:
+    state = 1
+    err()
+  except:
+    echo state
+
+main()
diff --git a/tests/ccgbugs/tnil_type.nim b/tests/ccgbugs/tnil_type.nim
new file mode 100644
index 000000000..9921b24a3
--- /dev/null
+++ b/tests/ccgbugs/tnil_type.nim
@@ -0,0 +1,15 @@
+discard """
+  targets: "c cpp"
+"""
+
+proc f1(v: typeof(nil)) = discard
+f1(nil)
+
+proc f2[T]() = discard
+f2[typeof(nil)]()
+
+proc f3(_: typedesc) = discard
+f3(typeof(nil))
+
+proc f4[T](_: T) = discard
+f4(nil)
diff --git a/tests/ccgbugs/tnoalias.nim b/tests/ccgbugs/tnoalias.nim
new file mode 100644
index 000000000..2c3c2f0f4
--- /dev/null
+++ b/tests/ccgbugs/tnoalias.nim
@@ -0,0 +1,13 @@
+discard """
+  ccodecheck: "\\i@'NI* NIM_NOALIAS field;' @'NIM_CHAR* NIM_NOALIAS x_p0,' @'void* NIM_NOALIAS q'"
+"""
+
+type
+  BigNum = object
+    field {.noalias.}: ptr UncheckedArray[int]
+
+proc p(x {.noalias.}: openArray[char]) =
+  var q {.noalias.}: pointer = addr(x[0])
+
+var bn: BigNum
+p "abc"
diff --git a/tests/ccgbugs/tnocodegen_for_compiletime.nim b/tests/ccgbugs/tnocodegen_for_compiletime.nim
new file mode 100644
index 000000000..3a952e303
--- /dev/null
+++ b/tests/ccgbugs/tnocodegen_for_compiletime.nim
@@ -0,0 +1,9 @@
+# bug #1679
+import macros, tables, hashes
+proc hash(v: NimNode): Hash = 4  # performance is for suckers
+macro test(body: untyped) =
+  var a = initCountTable[NimNode]()
+  a.inc(body)
+
+test:
+  1 + 1
diff --git a/tests/ccgbugs/tobjconstr_bad_aliasing.nim b/tests/ccgbugs/tobjconstr_bad_aliasing.nim
new file mode 100644
index 000000000..550f9ab75
--- /dev/null
+++ b/tests/ccgbugs/tobjconstr_bad_aliasing.nim
@@ -0,0 +1,76 @@
+discard """
+  output: '''(10, (20, ))
+42
+(x: 900.0, y: 900.0)
+(x: 900.0, y: 900.0)
+(x: 900.0, y: 900.0)'''
+"""
+
+import strutils, sequtils
+
+# bug #668
+
+type
+  TThing = ref object
+    data: int
+    children: seq[TThing]
+
+proc `$`(t: TThing): string =
+  result = "($1, $2)" % @[$t.data, join(map(t.children, proc(th: TThing): string = $th), ", ")]
+
+proc somethingelse(): seq[TThing] =
+  result = @[TThing(data: 20, children: @[])]
+
+proc dosomething(): seq[TThing] =
+  result = somethingelse()
+
+  result = @[TThing(data: 10, children: result)]
+
+echo($dosomething()[0])
+
+
+# bug #9844
+
+proc f(v: int): int = v
+
+type X = object
+  v: int
+
+var x = X(v: 42)
+
+x = X(v: f(x.v))
+echo x.v
+
+
+# bug #11525
+type
+  Point[T] = object
+    x, y: T
+
+proc adjustPos[T](width, height: int, pos: Point[T]): Point[T] =
+  result = pos
+
+  result = Point[T](
+    x: pos.x - (width / 2),
+    y: pos.y - (height / 2)
+  )
+
+proc adjustPos2[T](width, height: int, pos: Point[T]): Point[T] =
+  result = pos
+
+  result = Point[T](
+    x: result.x - (width / 2),
+    y: result.y - (height / 2)
+  )
+
+proc adjustPos3(width, height: int, pos: Point): Point =
+  result = pos
+
+  result = Point(
+    x: result.x - (width / 2),
+    y: result.y - (height / 2)
+  )
+
+echo adjustPos(200, 200, Point[float](x: 1000, y: 1000))
+echo adjustPos2(200, 200, Point[float](x: 1000, y: 1000))
+echo adjustPos3(200, 200, Point[float](x: 1000, y: 1000))
diff --git a/tests/ccgbugs/tobjconstr_outoforder.nim b/tests/ccgbugs/tobjconstr_outoforder.nim
new file mode 100644
index 000000000..846a753d5
--- /dev/null
+++ b/tests/ccgbugs/tobjconstr_outoforder.nim
@@ -0,0 +1,38 @@
+discard """
+  output: '''(left: 1, up: 0, right: 2, down: 0)
+(left: 0, up: 1, right: 0, down: 2)
+@[(left: 1, up: 0, right: 2, down: 0), (left: 0, up: 1, right: 0, down: 2)]
+@[(left: 1, up: 0, right: 2, down: 0), (left: 0, up: 1, right: 0, down: 2)]
+true'''
+"""
+
+# bug #5339
+type
+  Dirs = object
+    left: int
+    up: int
+    right: int
+    down: int
+
+let
+  a = Dirs(
+    left: 1,
+    right: 2,
+  )
+  b = Dirs(
+    up: 1,
+    down: 2,
+  )
+  works = @[
+    a,
+    b,
+  ]
+  fails = @[
+    Dirs(left: 1, right: 2),
+    Dirs(up: 1, down: 2),
+  ]
+echo a
+echo b
+echo works
+echo fails
+echo works == fails
diff --git a/tests/ccgbugs/tobjconstr_regression.nim b/tests/ccgbugs/tobjconstr_regression.nim
new file mode 100644
index 000000000..d29abad97
--- /dev/null
+++ b/tests/ccgbugs/tobjconstr_regression.nim
@@ -0,0 +1,14 @@
+discard """
+  output: '''@[(username: "user", role: "admin", description: "desc", email_addr: "email"), (username: "user", role: "admin", description: "desc", email_addr: "email")]'''
+"""
+
+type
+  User = object of RootObj
+    username, role, description, email_addr: string
+
+# bug 5055
+let us4 = @[
+  User(username:"user", role:"admin", description:"desc", email_addr:"email"),
+  User(username:"user", role:"admin", description:"desc", email_addr:"email"),
+]
+echo us4
diff --git a/tests/ccgbugs/topenarraycast.nim b/tests/ccgbugs/topenarraycast.nim
new file mode 100644
index 000000000..7d1bc8d03
--- /dev/null
+++ b/tests/ccgbugs/topenarraycast.nim
@@ -0,0 +1,8 @@
+proc foo[T](s: var openArray[T]): T =
+  for x in s: result += x
+
+proc bar(xyz: var seq[int]) =
+  doAssert 6 == (seq[int](xyz)).foo()
+
+var t = @[1,2,3]
+bar(t)
diff --git a/tests/ccgbugs/tpartialcs.nim b/tests/ccgbugs/tpartialcs.nim
new file mode 100644
index 000000000..12ff65c37
--- /dev/null
+++ b/tests/ccgbugs/tpartialcs.nim
@@ -0,0 +1,20 @@
+
+# bug #2551
+
+type Tup = tuple
+  A, a: int
+
+type Obj = object
+  A, a: int
+
+var x: Tup # This works.
+var y: Obj # This doesn't.
+
+# bug #2212
+
+proc f() =
+  let
+    p = 1.0
+    P = 0.25 + 0.5
+
+f()
diff --git a/tests/ccgbugs/tprogmem.nim b/tests/ccgbugs/tprogmem.nim
new file mode 100644
index 000000000..58a20583a
--- /dev/null
+++ b/tests/ccgbugs/tprogmem.nim
@@ -0,0 +1,11 @@
+discard """
+  output: "5"
+  cmd: r"nim c --hints:on $options -d:release $file"
+  ccodecheck: "'/*PROGMEM*/ myLetVariable = {'"
+  targets: "c"
+"""
+
+var myLetVariable {.exportc, codegenDecl: "$# /*PROGMEM*/ $#".} = [1, 2, 3]
+
+myLetVariable[0] = 5
+echo myLetVariable[0]
diff --git a/tests/ccgbugs/trecursive_table.nim b/tests/ccgbugs/trecursive_table.nim
new file mode 100644
index 000000000..3406a1c31
--- /dev/null
+++ b/tests/ccgbugs/trecursive_table.nim
@@ -0,0 +1,17 @@
+
+# bug #1700
+import tables
+
+type
+  E* = enum
+    eX
+    eY
+  T* = object
+    case kind: E
+    of eX:
+      xVal: Table[string, T]
+    of eY:
+      nil
+
+proc p*(x: Table[string, T]) =
+  discard
diff --git a/tests/ccgbugs/trefseqsort.nim b/tests/ccgbugs/trefseqsort.nim
new file mode 100644
index 000000000..2410770cf
--- /dev/null
+++ b/tests/ccgbugs/trefseqsort.nim
@@ -0,0 +1,33 @@
+discard """
+  output: '''@[0, 4, 9, 1, 3, 2]
+@[0, 1, 2, 3, 9]'''
+"""
+# bug #6724
+import algorithm
+
+type
+  Bar = object
+    bar: ref seq[int]
+  Foo = ref Bar
+
+proc test(x: ref Foo) =
+  x.bar[].del(1)
+  x.bar[].sort(cmp)
+
+proc main() =
+  var foo: ref Foo
+  new(foo)
+
+  var s = @[0, 4, 9, 1, 3, 2]
+
+  var sr: ref seq[int]
+  new(sr)
+  sr[] = s
+
+  foo[] = Foo(bar: sr)
+  echo($foo.bar[])
+
+  test(foo)
+  echo($foo.bar[])
+
+main()
diff --git a/tests/ccgbugs/tresult_of_array.nim b/tests/ccgbugs/tresult_of_array.nim
new file mode 100644
index 000000000..fb5abf18a
--- /dev/null
+++ b/tests/ccgbugs/tresult_of_array.nim
@@ -0,0 +1,29 @@
+discard """
+  output: '''false
+true
+false
+[false, false, false]
+'''
+"""
+
+# bug #7332
+# resetLoc generate incorrect memset code
+# because of array passed as argument decaying into a pointer
+
+import tables
+const tableOfArray = {
+    "one": [true, false, false],
+    "two": [false, true, false],
+    "three": [false, false, true]
+}.toTable()
+for i in 0..2:
+    echo tableOfArray["two"][i]
+
+var seqOfArray = @[
+    [true, false, false],
+    [false, true, false],
+    [false, false, true]
+]
+proc crashingProc*[B](t: seq[B], index: Natural): B =
+    discard
+echo seqOfArray.crashingProc(0)
diff --git a/tests/ccgbugs/tret_arg_init.nim b/tests/ccgbugs/tret_arg_init.nim
new file mode 100644
index 000000000..e39e5a0de
--- /dev/null
+++ b/tests/ccgbugs/tret_arg_init.nim
@@ -0,0 +1,28 @@
+discard """
+  output: '''
+
+
+
+'''
+"""
+
+type Bar = object
+  s1, s2: string
+
+proc initBar(): Bar = discard
+
+var a: array[5, Bar]
+a[0].s1 = "hey"
+a[0] = initBar()
+echo a[0].s1
+
+type Foo = object
+  b: Bar
+var f: Foo
+f.b.s1 = "hi"
+f.b = initBar()
+echo f.b.s1
+
+var ad = addr f.b
+ad[] = initBar()
+echo ad[].s1
diff --git a/tests/ccgbugs/tsamename3.nim b/tests/ccgbugs/tsamename3.nim
new file mode 100644
index 000000000..ded18e9f8
--- /dev/null
+++ b/tests/ccgbugs/tsamename3.nim
@@ -0,0 +1,120 @@
+block: # bug #15526
+  block:
+    type Foo = ref object
+      x1: int
+    let f1 = Foo(x1: 1)
+  block:
+    type Foo = ref object
+      x2: int
+    let f2 = Foo(x2: 2)
+
+block: # ditto
+  template fn() =
+    block:
+      type Foo = ref object
+        x1: int
+      let f1 = Foo(x1: 1)
+      doAssert f1.x1 == 1
+    block:
+      type Foo = ref object
+        x2: int
+      let f2 = Foo(x2: 2)
+      doAssert f2.x2 == 2
+  static: fn()
+  fn()
+
+block: # bug #17162
+  template fn =
+    var ret: string
+    block:
+      type A = enum a0, a1, a2
+      for ai in A:
+        ret.add $ai
+    block:
+      type A = enum b0, b1, b2, b3
+      for ai in A:
+        ret.add $ai
+    doAssert ret == "a0a1a2b0b1b2b3"
+
+  static: fn() # ok
+  fn() # was bug
+
+block: # ditto
+  proc fn =
+    var ret: string
+    block:
+      type A = enum a0, a1, a2
+      for ai in A:
+        ret.add $ai
+    block:
+      type A = enum b0, b1, b2, b3
+      for ai in A:
+        ret.add $ai
+    doAssert ret == "a0a1a2b0b1b2b3"
+
+  static: fn() # ok
+  fn() # was bug
+
+block: # bug #5170
+  block:
+    type Foo = object
+      x1: int
+    let f1 = Foo(x1: 1)
+  block:
+    type Foo = object
+      x2: int
+    let f2 = Foo(x2: 2)
+
+block: # ditto
+  block:
+    type Foo = object
+      bar: bool
+    var f1: Foo
+
+  block:
+    type Foo = object
+      baz: int
+    var f2: Foo
+    doAssert f2.baz == 0
+
+  block:
+    template fn() =
+      block:
+        type Foo = object
+          x1: int
+        let f1 = Foo(x1: 1)
+        doAssert f1.x1 == 1
+      block:
+        type Foo = object
+          x2: int
+        let f2 = Foo(x2: 2)
+        doAssert f2.x2 == 2
+    static: fn()
+    fn()
+
+when true: # ditto, refs https://github.com/nim-lang/Nim/issues/5170#issuecomment-582712132
+  type Foo1 = object # at top level
+    bar: bool
+  var f1: Foo1
+
+  block:
+    type Foo1 = object
+      baz: int
+    var f2: Foo1
+    doAssert f2.baz == 0
+
+block: # make sure `hashType` doesn't recurse infinitely
+  type
+    PFoo = ref object
+      a, b: PFoo
+      c: int
+  var a: PFoo
+
+block: # issue #22571
+  macro foo(x: typed) =
+    result = x
+
+  block: # or `proc main =`
+    foo:
+      type Foo = object
+    doAssert $Foo() == "()"
diff --git a/tests/ccgbugs/tsequence_outoforder.nim b/tests/ccgbugs/tsequence_outoforder.nim
new file mode 100644
index 000000000..93a45900d
--- /dev/null
+++ b/tests/ccgbugs/tsequence_outoforder.nim
@@ -0,0 +1,11 @@
+discard """
+  output: '''@[2]'''
+"""
+
+# bug #9684
+
+var s2 = @[2, 2]
+
+s2 = @[s2.len]
+
+echo s2
diff --git a/tests/ccgbugs/tsighash_typename_regression.nim b/tests/ccgbugs/tsighash_typename_regression.nim
new file mode 100644
index 000000000..b93eebd20
--- /dev/null
+++ b/tests/ccgbugs/tsighash_typename_regression.nim
@@ -0,0 +1,32 @@
+discard """
+output: '''
+123
+baz
+'''
+"""
+
+# bug #5147
+
+proc foo[T](t: T) =
+  type Wrapper = object
+    get: T
+  let w = Wrapper(get: t)
+  echo w.get
+
+foo(123)
+foo("baz")
+
+# Empty type in template is correctly disambiguated
+block:
+  template foo() =
+    type M = object
+      discard
+    var y = M()
+
+  foo()
+
+  type M = object
+    x: int
+
+  var x = M(x: 1)
+  doAssert(x.x == 1)
diff --git a/tests/ccgbugs/tstringslice.nim b/tests/ccgbugs/tstringslice.nim
new file mode 100644
index 000000000..0ff448dcf
--- /dev/null
+++ b/tests/ccgbugs/tstringslice.nim
@@ -0,0 +1,20 @@
+discard """
+  output: '''1
+1234
+2
+234
+3
+34
+4
+4'''
+"""
+
+# bug #794
+type TRange = range[0..3]
+
+const str = "123456789"
+
+for i in TRange.low .. TRange.high:
+  echo str[i]                          #This works fine
+  echo str[int(i) .. int(TRange.high)] #So does this
+  #echo str[i .. TRange.high]           #The compiler complains about this
diff --git a/tests/ccgbugs/tunsafeaddr.nim b/tests/ccgbugs/tunsafeaddr.nim
new file mode 100644
index 000000000..f868739de
--- /dev/null
+++ b/tests/ccgbugs/tunsafeaddr.nim
@@ -0,0 +1,47 @@
+discard """
+  output: '''12
+4'''
+"""
+
+{.emit: """
+NI sum(NI* a, NI len) {
+  NI i, result = 0;
+  for (i = 0; i < len; ++i) result += a[i];
+  return result;
+}
+""".}
+
+proc sum(a: ptr int; len: int): int {.importc, nodecl.}
+
+proc main =
+  let foo = [8, 3, 1]
+  echo sum(unsafeAddr foo[0], foo.len)
+
+
+# bug #3736
+
+proc p(x: seq[int]) = discard x[0].unsafeAddr # works
+proc q(x: seq[SomeInteger]) = discard x[0].unsafeAddr # doesn't work
+
+p(@[1])
+q(@[1])
+
+main()
+
+# bug #9403
+
+type
+  MyObj = ref object
+    len: int
+    val: UncheckedArray[uint64]
+
+proc spot(x: MyObj): int64 =
+  result = cast[UncheckedArray[int64]](x.val)[0]
+
+proc newMyObj(len: int): MyObj =
+  unsafeNew(result, sizeof(result[]) + len * sizeof(uint64))
+  result.len = len
+  result.val[0] = 4u64
+  result.val[1] = 8u64
+
+echo spot(newMyObj(2))
diff --git a/tests/ccgbugs/tuple_canon.nim b/tests/ccgbugs/tuple_canon.nim
new file mode 100644
index 000000000..fbb971861
--- /dev/null
+++ b/tests/ccgbugs/tuple_canon.nim
@@ -0,0 +1,119 @@
+discard """
+output: '''
+vidx 18
+0,0
+'''
+"""
+
+# bug #4626
+var foo: (int, array[1, int]) # Tuple must be of length > 1
+let bar = (1, [1])
+foo = bar                     # No error if assigned directly
+
+# bug #2250
+
+import math
+
+type
+    Meters = float
+    Point2[T] = tuple[x, y: T]
+
+    HexState* = enum
+        hsOn, hsOff
+
+    Index = uint16
+
+    HexGrid* = object
+        w, h: int                       ## Width and height of the hex grid.
+        radius: Meters                  ## Radius of circle that circumscribes a hexagon.
+        grid: seq[HexState]             ## Information on what hexes are drawn.
+
+    HexVtxIndex = enum
+        hiA, hiB, hiC, hiD, hiE, hiF
+
+    HexCoord* = Point2[int]
+
+const
+    HexDY = sqrt(1.0 - (0.5 * 0.5))     # dy from center to midpoint of 1-2
+    HexDX = sqrt(1.0 - (HexDY * HexDY)) # dx from center to midpoint of 1-5 (0.5)
+
+
+let
+    hexOffsets : array[HexVtxIndex, Point2[float]] = [
+                  (-1.0, 0.0),
+                  (-HexDX, -HexDY),
+                  (HexDX, -HexDY),
+                  (1.0, 0.0),
+                  (HexDX, HexDY),
+                  (-HexDX, HexDY)]
+
+    evenSharingOffsets : array[HexVtxIndex, tuple[hc: HexCoord; idx: HexVtxIndex]] = [
+            ((0,0), hiA),
+            ((0,0), hiB),
+            ((1,-1), hiA),
+            ((1,0), hiB),
+            ((1,0), hiA),
+            ((0,1), hiB)]
+
+    oddSharingOffsets : array[HexVtxIndex, tuple[hc: HexCoord; idx: HexVtxIndex]] = [
+            ((0,0), hiA),
+            ((0,0), hiB),
+            ((1,0), hiA),
+            ((1,1), hiB),
+            ((1,1), hiA),
+            ((0,1), hiB)]
+
+template odd*(i: int) : untyped =
+    (i and 1) != 0
+
+proc vidx(hg: HexGrid; col, row: int; i: HexVtxIndex) : Index =
+    #NOTE: this variation compiles
+    #var offset : typeof(evenSharingOffsets[i])
+    #
+    #if odd(col):
+    #    offset = oddSharingOffsets[i]
+    #else:
+    #    offset = evenSharingOffsets[i]
+
+    let
+        #NOTE: this line generates the bad code
+        offset = (if odd(col): oddSharingOffsets[i] else: evenSharingOffsets[i])
+        x = col + 1 + offset.hc.x
+        y = row + 1 + offset.hc.y
+
+    result = Index(x*2 + y * (hg.w + 2)*2 + int(offset.idx))
+
+proc go() =
+    var hg : HexGrid
+
+    echo "vidx ", $vidx(hg, 1, 2, hiC)
+
+go()
+
+# another sighashes problem: In tuples we have to ignore ranges.
+
+type
+  Position = tuple[x, y: int16]
+  n16 = range[0'i16..high(int16)]
+
+proc print(pos: Position) =
+  echo $pos.x, ",", $pos.y
+
+var x = 0.n16
+var y = 0.n16
+print((x, y))
+
+
+# bug #6889
+proc createProgressSetterWithPropSetter[T](setter: proc(v: T)) = discard
+
+type A = distinct array[4, float32]
+type B = distinct array[3, float32]
+
+type Foo[T] = tuple
+    setter: proc(v: T)
+
+proc getFoo[T](): Foo[T] = discard
+
+createProgressSetterWithPropSetter(getFoo[A]().setter)
+createProgressSetterWithPropSetter(getFoo[B]().setter)
diff --git a/tests/ccgbugs/tuplecast.nim b/tests/ccgbugs/tuplecast.nim
new file mode 100644
index 000000000..d60e8c490
--- /dev/null
+++ b/tests/ccgbugs/tuplecast.nim
@@ -0,0 +1,8 @@
+
+# bug #4345
+
+# only needs to compile
+proc f(): tuple[a, b: uint8] = (1'u8, 2'u8)
+
+let a, b = f()
+let c = cast[int](b)
diff --git a/tests/ccgbugs/tweakopenarray.nim b/tests/ccgbugs/tweakopenarray.nim
new file mode 100644
index 000000000..51d781331
--- /dev/null
+++ b/tests/ccgbugs/tweakopenarray.nim
@@ -0,0 +1,12 @@
+# bug #4089
+
+type
+  Proc = proc(args: openArray[Bar]): Bar
+
+  Foo = object
+    p: Proc
+
+  Bar = object
+    f: Foo
+
+proc bar(val: Foo): Bar = Bar()
diff --git a/tests/ccgbugs/twrong_discriminant_check.nim b/tests/ccgbugs/twrong_discriminant_check.nim
new file mode 100644
index 000000000..a802f45ef
--- /dev/null
+++ b/tests/ccgbugs/twrong_discriminant_check.nim
@@ -0,0 +1,30 @@
+discard """
+  output: "(kind: None)"
+"""
+
+when true:
+  # bug #2637
+
+  type
+    OptionKind = enum
+      None,
+      Some
+
+    Option*[T] = object
+      case kind: OptionKind
+      of None:
+        discard
+      of Some:
+        value*: T
+
+  proc none*[T](): Option[T] =
+    Option[T](kind: None)
+
+  proc none*(T: typedesc): Option[T] = none[T]()
+
+
+  proc test(): Option[int] =
+    int.none
+
+  echo test()
+
diff --git a/tests/ccgbugs/twrong_method.nim b/tests/ccgbugs/twrong_method.nim
new file mode 100644
index 000000000..9879c6114
--- /dev/null
+++ b/tests/ccgbugs/twrong_method.nim
@@ -0,0 +1,27 @@
+discard """
+  cmd: "nim c -d:release $file"
+  output: '''correct method'''
+"""
+# bug #5439
+type
+  Control* = ref object of RootObj
+
+  ControlImpl* = ref object of Control
+
+  Container* = ref object of ControlImpl
+
+  ContainerImpl* = ref object of Container
+
+method testProc*(control: Control) {.base.} = echo "wrong method"
+
+method testProc*(container: Container) = echo "correct method"
+
+proc main()
+
+main() # wrong method called
+
+proc main() =
+  var container = new ContainerImpl
+  container.testProc()
+
+# main() # correct method called
diff --git a/tests/ccgbugs/twrong_rc_for_refarray.nim b/tests/ccgbugs/twrong_rc_for_refarray.nim
new file mode 100644
index 000000000..99bdac5e1
--- /dev/null
+++ b/tests/ccgbugs/twrong_rc_for_refarray.nim
@@ -0,0 +1,26 @@
+discard """
+  output: '''m[0][0] = 1.0
+m[0][0] = 2.0'''
+"""
+# bug #4653
+type
+  Vector = ref array[2, float64]
+  Matrix = ref array[2, Vector]
+
+proc newVector(): Vector =
+  new(result)
+
+proc newMatrix(): Matrix =
+  new(result)
+  for ix in 0 .. 1:
+    result[ix] = newVector()
+
+let m = newMatrix()
+
+m[0][0] = 1.0
+echo "m[0][0] = ", m[0][0]
+
+GC_fullCollect()
+
+m[0][0] = 2.0
+echo "m[0][0] = ", m[0][0]
diff --git a/tests/ccgbugs/twrong_string_asgn.nim b/tests/ccgbugs/twrong_string_asgn.nim
new file mode 100644
index 000000000..669b7f8f5
--- /dev/null
+++ b/tests/ccgbugs/twrong_string_asgn.nim
@@ -0,0 +1,19 @@
+discard """
+  output: "adf"
+"""
+
+import asyncdispatch
+const
+  test = ["adf"]
+
+proc foo() {.async.} =
+  for i in test:
+    echo(i)
+
+var finished = false
+let x = foo()
+x.callback =
+  proc () =
+    finished = true
+
+while not finished: poll()
diff --git a/tests/ccgbugs/twrong_tupleconv.nim b/tests/ccgbugs/twrong_tupleconv.nim
new file mode 100644
index 000000000..031712dac
--- /dev/null
+++ b/tests/ccgbugs/twrong_tupleconv.nim
@@ -0,0 +1,35 @@
+discard """
+  targets: "c cpp"
+  matrix: "--gc:refc; --gc:arc"
+"""
+
+# bug #1833
+iterator myitems*[T](a: var seq[T]): var T {.inline.} =
+  ## iterates over each item of `a` so that you can modify the yielded value.
+  var i = 0
+  let L = len(a)
+  while i < L:
+    yield a[i]
+    inc(i)
+    doAssert(len(a) == L, "the length of the seq changed while iterating over it")
+
+# Works fine
+var xs = @[1,2,3]
+for x in myitems(xs):
+  inc x
+
+# Tuples don't work
+var ys = @[(1,"a"),(2,"b"),(3,"c")]
+for y in myitems(ys):
+  inc y[0]
+
+# bug #16331
+type T1 = tuple[a, b: int]
+
+proc p(b: bool): string =
+  var x: T1 = (10, 20)
+  x = if b: (x.b, x.a) else: (-x.b, -x.a)
+  $x
+
+assert p(false) == "(a: -20, b: -10)"
+assert p(true) == "(a: 20, b: 10)"
diff --git a/tests/ccgbugs/twrongrefcounting.nim b/tests/ccgbugs/twrongrefcounting.nim
new file mode 100644
index 000000000..8ebaf4058
--- /dev/null
+++ b/tests/ccgbugs/twrongrefcounting.nim
@@ -0,0 +1,33 @@
+discard """
+  output: '''ok'''
+  cmd: "nim c -r --gc:refc -d:useGcAssert -d:useSysAssert -d:fulldebug -d:smokeCycles $file"
+"""
+
+# bug #9825
+func empty(T: typedesc): T = discard
+const emptyChunk = @(empty(array[10, byte]))
+
+var lst: seq[seq[byte]]
+lst.add emptyChunk
+
+doAssert($lst == "@[@[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]")
+
+
+# bug #6234
+type
+    Foo = ref object
+        s: seq[Bar]
+    Bar = ref object
+        f: Foo
+
+proc test() =
+    var f = Foo.new()
+    for i in 0 .. 5:
+        f.s = @[]
+        for j in 0 .. 5:
+            var b = Bar.new()
+            b.f = f
+            f.s.add(b)
+
+test()
+echo "ok"
diff --git a/tests/ccgbugs/xarray9578.nim b/tests/ccgbugs/xarray9578.nim
new file mode 100644
index 000000000..849f16821
--- /dev/null
+++ b/tests/ccgbugs/xarray9578.nim
@@ -0,0 +1,7 @@
+import t9578
+
+proc testArray*(x: var array[3,mytype]) =
+  f(x[0].addr)
+
+proc testArray2*(x: var ptr array[3,mytype]) =
+  f(x[0].addr)
diff --git a/tests/ccgbugs/xoa9578.nim b/tests/ccgbugs/xoa9578.nim
new file mode 100644
index 000000000..94ef34519
--- /dev/null
+++ b/tests/ccgbugs/xoa9578.nim
@@ -0,0 +1,4 @@
+import t9578
+
+proc testOpenArray*(x: var openArray[mytype]) =
+  f(x[0].addr)
diff --git a/tests/ccgbugs/xseq9578.nim b/tests/ccgbugs/xseq9578.nim
new file mode 100644
index 000000000..782efe04f
--- /dev/null
+++ b/tests/ccgbugs/xseq9578.nim
@@ -0,0 +1,7 @@
+import t9578
+
+proc testSeq*(x: var seq[mytype]) =
+  f(x[0].addr)
+
+proc testSeq2*(x: var ptr seq[mytype]) =
+  f(x[0].addr)
diff --git a/tests/ccgbugs/xtuple9578.nim b/tests/ccgbugs/xtuple9578.nim
new file mode 100644
index 000000000..b6320fc24
--- /dev/null
+++ b/tests/ccgbugs/xtuple9578.nim
@@ -0,0 +1,7 @@
+import t9578
+
+proc testTuple*(x: var tuple[a:mytype,b:mytype,c:mytype]) =
+  f(x[0].addr)
+
+proc testTuple2*(x: var ptr tuple[a:mytype,b:mytype,c:mytype]) =
+  f(x[0].addr)
diff --git a/tests/ccgbugs/xua9578.nim b/tests/ccgbugs/xua9578.nim
new file mode 100644
index 000000000..9ba6f8fbc
--- /dev/null
+++ b/tests/ccgbugs/xua9578.nim
@@ -0,0 +1,7 @@
+import t9578
+
+proc testUncheckedArray*(x: var UncheckedArray[mytype]) =
+  f(x[0].addr)
+
+proc testUncheckedArray2*(x: var ptr UncheckedArray[mytype]) =
+  f(x[0].addr)