rollup merge of #17085 : jakub-/issue-17074

src/test/run-pass/issue-17074.rs

@@ -0,0 +1,20 @@
+// Copyright 2014 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.
+
+static X: u64 = -1 as u16 as u64;
+static Y: u64 = -1 as u32 as u64;
+
+fn main() {
+    assert_eq!(match 1 {
+        X => unreachable!(),
+        Y => unreachable!(),
+        _ => 1i
+    }, 1);
+}