Auto merge of #49949 - oli-obk:const_signed_pat, r=eddyb

Sign extend constants in range patterns

fixes  #49940

r? @Mark-Simulacrum

1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/ui/const-eval/const_signed_pat.rs b/src/test/ui/const-eval/const_signed_pat.rs
new file mode 100644
index 00000000000..f53d6f3fa0a
--- /dev/null
+++ b/src/test/ui/const-eval/const_signed_pat.rs
@@ -0,0 +1,19 @@
+// Copyright 2018 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-pass
+
+fn main() {
+    const MIN: i8 = -5;
+    match 5i8 {
+        MIN...-1 => {},
+        _ => {},
+    }
+}