1 files changed, 71 insertions, 0 deletions
diff --git a/tests/vm/tref.nim b/tests/vm/tref.nim
new file mode 100644
index 000000000..e70305225
--- /dev/null
+++ b/tests/vm/tref.nim
@@ -0,0 +1,71 @@
+static:
+  var
+    a: ref string
+    b: ref string
+  new a
+
+  a[] = "Hello world"
+  b = a
+
+  b[5] = 'c'
+  doAssert a[] == "Hellocworld"
+  doAssert b[] == "Hellocworld"
+
+  proc notGlobal() =
+    var
+      a: ref string
+      b: ref string
+    new a
+
+    a[] = "Hello world"
+    b = a
+
+    b[5] = 'c'
+    doAssert a[] == "Hellocworld"
+    doAssert b[] == "Hellocworld"
+  notGlobal()
+
+static: # bug 6081
+  block:
+    type Obj = object
+      field: ref int
+    var i: ref int
+    new(i)
+    var r = Obj(field: i)
+    var rr = r
+    r.field = nil
+    doAssert rr.field != nil
+
+  proc foo() = # Proc to avoid special global logic
+    var s: seq[ref int]
+    var i: ref int
+    new(i)
+    s.add(i)
+    var head = s[0]
+    s[0] = nil
+    doAssert head != nil
+
+  foo()
+
+static:
+
+  block: # global alias
+    var s: ref int
+    new(s)
+    var ss = s
+    s[] = 1
+    doAssert ss[] == 1
+
+static: # bug #8402
+  type R = ref object
+  var empty: R
+  let otherEmpty = empty
+
+block:
+  # fix https://github.com/timotheecour/Nim/issues/88
+  template fun() =
+    var s = @[10,11,12]
+    var a = s[0].addr
+    a[] += 100 # was giving SIGSEGV
+    doAssert a[] == 110
+  static: fun()