1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/functions-closures/parallel-codegen-closures.rs b/src/test/ui/functions-closures/parallel-codegen-closures.rs
new file mode 100644
index 000000000..79759daba
--- /dev/null
+++ b/src/test/ui/functions-closures/parallel-codegen-closures.rs
@@ -0,0 +1,28 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(stable_features)]
+
+// Tests parallel codegen - this can fail if the symbol for the anonymous
+// closure in `sum` pollutes the second codegen unit from the first.
+
+// compile-flags: -C codegen_units=2
+
+#![feature(iter_arith)]
+
+mod a {
+    fn foo() {
+        let x = ["a", "bob", "c"];
+        let len: usize = x.iter().map(|s| s.len()).sum();
+    }
+}
+
+mod b {
+    fn bar() {
+        let x = ["a", "bob", "c"];
+        let len: usize = x.iter().map(|s| s.len()).sum();
+    }
+}
+
+fn main() {
+}