1 files changed, 26 insertions, 0 deletions
diff --git a/tests/parallel/tinvalid_counter_usage.nim b/tests/parallel/tinvalid_counter_usage.nim
new file mode 100644
index 000000000..c6303c651
--- /dev/null
+++ b/tests/parallel/tinvalid_counter_usage.nim
@@ -0,0 +1,26 @@
+discard """
+  errormsg: "invalid usage of counter after increment"
+  line: 21
+"""
+
+import threadpool
+
+proc f(a: openArray[int]) =
+  for x in a: echo x
+
+proc f(a: int) = echo a
+
+proc main() =
+  var a: array[0..30, int]
+  parallel:
+    spawn f(a[0..15])
+    spawn f(a[16..30])
+    var i = 0
+    while i <= 30:
+      inc i
+      spawn f(a[i])
+      inc i
+      #spawn f(a[i+1])
+      #inc i  # inc i, 2  would be correct here
+
+main()