1 files changed, 26 insertions, 0 deletions
diff --git a/tests/effects/tgcsafe.nim b/tests/effects/tgcsafe.nim
new file mode 100644
index 000000000..cfac3ddd8
--- /dev/null
+++ b/tests/effects/tgcsafe.nim
@@ -0,0 +1,26 @@
+discard """
+  errormsg: "'mainUnsafe' is not GC-safe as it performs an indirect call here"
+  line: 26
+  cmd: "nim $target --hints:on --threads:on $options $file"
+"""
+
+# bug #6955
+var global_proc: proc(a: string): int {.nimcall.} = nil
+
+proc myproc(i: int) {.gcsafe.} =
+  if global_proc != nil:
+    echo "a"
+  if isNil(global_proc):
+    return
+
+proc mymap(x: proc ()) {.effectsOf: x.} =
+  x()
+
+var
+  myglob: string
+
+proc mainSafe() {.gcsafe.} =
+  mymap(proc () = echo "foo")
+
+proc mainUnsafe() {.gcsafe.} =
+  mymap(proc () = myglob = "bar"; echo "foo", myglob)