return erased regions from fulfill_obligation

Fixes #26802.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-26802.rs b/src/test/run-pass/issue-26802.rs
new file mode 100644
index 00000000000..854340b0eae
--- /dev/null
+++ b/src/test/run-pass/issue-26802.rs
@@ -0,0 +1,23 @@
+// Copyright 2015 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.
+
+trait Foo<'a> {
+    fn bar<'b>(&self, x: &'b u8) -> u8 where 'a: 'b { *x+7 }
+}
+
+pub struct FooBar;
+impl Foo<'static> for FooBar {}
+fn test(foobar: FooBar) -> Box<Foo<'static>> {
+    Box::new(foobar)
+}
+
+fn main() {
+    assert_eq!(test(FooBar).bar(&4), 11);
+}