Auto merge of #34672 - luqmana:27021-reassign-match-body, r=eddyb

Make match discriminant reassignment check more accurate.

Fixes #27021.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-27021.rs b/src/test/run-pass/issue-27021.rs
new file mode 100644
index 00000000000..eb7d529f0ad
--- /dev/null
+++ b/src/test/run-pass/issue-27021.rs
@@ -0,0 +1,21 @@
+// 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.
+
+fn main() {
+    let mut c = (1, (1, "".to_owned()));
+    match c {
+        c2 => { (c.1).0 = 2; assert_eq!((c2.1).0, 1); }
+    }
+
+    let mut c = (1, (1, (1, "".to_owned())));
+    match c.1 {
+        c2 => { ((c.1).1).0 = 3; assert_eq!((c2.1).0, 1); }
+    }
+}