Merge pull request #37173 from brson/stable-next 1.12.1

[stable] Backports for 1.12.1

1 files changed, 34 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-36381.rs b/src/test/run-pass/issue-36381.rs
new file mode 100644
index 00000000000..6cd991bd942
--- /dev/null
+++ b/src/test/run-pass/issue-36381.rs
@@ -0,0 +1,34 @@
+// 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.
+
+// Regression test for #36381. The trans collector was asserting that
+// there are no projection types, but the `<&str as
+// StreamOnce>::Position` projection contained a late-bound region,
+// and we don't currently normalize in that case until the function is
+// actually invoked.
+
+pub trait StreamOnce {
+    type Position;
+}
+
+impl<'a> StreamOnce for &'a str {
+    type Position = usize;
+}
+
+pub fn parser<F>(_: F) {
+}
+
+fn follow(_: &str) -> <&str as StreamOnce>::Position {
+    panic!()
+}
+
+fn main() {
+    parser(follow);
+}