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-rw-r--r--tests/arc/t18645.nim18
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/arc/t18645.nim b/tests/arc/t18645.nim
new file mode 100644
index 000000000..c5fddd4bb
--- /dev/null
+++ b/tests/arc/t18645.nim
@@ -0,0 +1,18 @@
+discard """
+  matrix: "--gc:arc; --gc:refc"
+  output: '''
+1
+2
+3
+'''
+"""
+
+proc bitTypeIdUnion() =
+  var bitId {.global.} = block:
+    0
+  inc bitId
+  echo bitId
+
+bitTypeIdUnion()
+bitTypeIdUnion()
+bitTypeIdUnion()