Substitute into the impl method rather than the trait method when emitting vtables. Closes #8601.

1 files changed, 26 insertions, 0 deletions

diff --git a/src/test/run-pass/trait-object-generics.rs b/src/test/run-pass/trait-object-generics.rs
new file mode 100644
index 00000000000..7bee660410d
--- /dev/null
+++ b/src/test/run-pass/trait-object-generics.rs
@@ -0,0 +1,26 @@
+// Copyright 2013 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 for #8601
+
+enum Type<T> { Constant }
+
+trait Trait<K,V> {
+    fn method(&self,Type<(K,V)>) -> int;
+}
+
+impl<V> Trait<u8,V> for () {
+    fn method(&self, _x: Type<(u8,V)>) -> int { 0 }
+}
+
+fn main () {
+    let a = @() as @Trait<u8, u8>;
+    assert_eq!(a.method(Constant), 0);
+}