close #2771(add testcase for #2771) (#15932)

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/iter/t2771.nim b/tests/iter/t2771.nim
new file mode 100644
index 000000000..49befb0a9
--- /dev/null
+++ b/tests/iter/t2771.nim
@@ -0,0 +1,21 @@
+template t1(i: int): int=
+  i+1
+template t2(i: int): int=
+  i+1
+
+doAssert t1(10).t2() == 12
+
+
+template it1(i: int): iterator(): int =
+  iterator result(): int {.closure, gensym.} =
+    yield i+1
+  result
+
+template it2(iter: iterator(): int): iterator(): int =
+  iterator result(): int {.closure, gensym.} =
+    yield iter()+1
+  result
+
+let x2 = it1(10).it2()
+
+doAssert x2() == 12