2 files changed, 46 insertions, 0 deletions
diff --git a/tests/notnil/tnotnil5.nim b/tests/notnil/tnotnil5.nim
new file mode 100644
index 000000000..2dcb7f7c3
--- /dev/null
+++ b/tests/notnil/tnotnil5.nim
@@ -0,0 +1,28 @@
+discard """
+  matrix: "--threads:on"
+"""
+
+{.experimental: "parallel".}
+{.experimental: "notnil".}
+import threadpool
+
+type
+  AO = object
+    x: int
+
+  A = ref AO not nil
+
+proc process(a: A): A =
+  return A(x: a.x+1)
+
+proc processMany(ayys: openArray[A]): seq[A] =
+  var newAs: seq[FlowVar[A]]
+
+  parallel:
+    for a in ayys:
+      newAs.add(spawn process(a))
+  for newAflow in newAs:
+    let newA = ^newAflow
+    if isNil(newA):
+      return @[]
+    result.add(newA)
diff --git a/tests/notnil/tparse.nim b/tests/notnil/tparse.nim
new file mode 100644
index 000000000..5c938ff04
--- /dev/null
+++ b/tests/notnil/tparse.nim
@@ -0,0 +1,18 @@
+# issue #16324
+
+{.push experimental: "notnil".}
+
+block:
+  type Foo = ref object
+    value: int
+    
+  proc newFoo1(): Foo not nil =               # This compiles
+    return Foo(value: 1)
+    
+  proc newFoo2(): Foo not nil {.inline.} =    # This does not
+    return Foo(value: 1)
+
+  doAssert newFoo1().value == 1
+  doAssert newFoo2().value == 1
+
+{.pop.}