Auto merge of #23361 - petrochenkov:refdst, r=jakub-

After this patch code like `let ref a = *"abcdef"` doesn't cause ICE anymore.
Required for #23121

There are still places in rustc_trans where pointers are always assumed to be thin. In particular, #19064 is not resolved by this patch.

1 files changed, 20 insertions, 0 deletions

diff --git a/src/test/run-pass/match-ref-unsized.rs b/src/test/run-pass/match-ref-unsized.rs
new file mode 100644
index 00000000000..4de028299df
--- /dev/null
+++ b/src/test/run-pass/match-ref-unsized.rs
@@ -0,0 +1,20 @@
+// Copyright 2015 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.
+
+// Binding unsized expressions to ref patterns
+
+pub fn main() {
+    let ref a = *"abcdef";
+    assert_eq!(a, "abcdef");
+
+    match *"12345" {
+        ref b => { assert_eq!(b, "12345") }
+    }
+}