Add regression test for issue #18514

Author: bkoropoff

src/test/auxiliary/issue-18514.rs

@@ -0,0 +1,27 @@
+// 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.
+
+#![crate_type = "rlib"]
+
+pub trait Tr {
+    fn tr(&self);
+}
+
+pub struct St<V>(pub Vec<V>);
+
+impl<V> Tr for St<V> {
+    fn tr(&self) {
+        match self {
+            &St(ref v) => {
+                v.iter();
+            }
+        }
+    }
+}

src/test/run-pass/issue-18514.rs

@@ -0,0 +1,24 @@
+// Copyright 2012 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.
+
+// Test that we don't ICE when translating a generic impl method from
+// an extern crate that contains a match expression on a local
+// variable lvalue where one of the match case bodies contains an
+// expression that autoderefs through an overloaded generic deref
+// impl.
+
+// aux-build:issue-18514.rs
+extern crate "issue-18514" as ice;
+use ice::{Tr, St};
+
+fn main() {
+    let st: St<()> = St(vec![]);
+    st.tr();
+}