trans: Make sure that closures only get translated once.

1 files changed, 26 insertions, 0 deletions

diff --git a/src/test/run-pass/issue34569.rs b/src/test/run-pass/issue34569.rs
new file mode 100644
index 00000000000..41d02e96cc2
--- /dev/null
+++ b/src/test/run-pass/issue34569.rs
@@ -0,0 +1,26 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags:-g
+
+// In this test we just want to make sure that the code below does not lead to
+// a debuginfo verification assertion during compilation. This was caused by the
+// closure in the guard being translated twice due to how match expressions are
+// handled.
+//
+// See https://github.com/rust-lang/rust/issues/34569 for details.
+
+fn main() {
+    match 0 {
+        e if (|| { e == 0 })() => {},
+        1 => {},
+        _ => {}
+    }
+}