Regression test for #8874

Closes #8874.

src/test/run-pass/inconsistent-lifetime-mismatch.rs

@@ -0,0 +1,21 @@
+// 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.
+
+fn foo(_: &[&str]) {}
+
+fn bad(a: &str, b: &str) {
+    foo(&[a, b]);
+}
+
+fn good(a: &str, b: &str) {
+    foo(&[a.as_slice(), b.as_slice()]);
+}
+
+fn main() {}