Fix bad error message with `::<` in types

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/compile-fail/issue-36116.rs b/src/test/compile-fail/issue-36116.rs
new file mode 100644
index 00000000000..9abf2b5ec3a
--- /dev/null
+++ b/src/test/compile-fail/issue-36116.rs
@@ -0,0 +1,23 @@
+// Copyright 2016 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.
+
+struct Foo<T> {
+    _a: T,
+}
+
+fn main() {
+    let f = Some(Foo { _a: 42 }).map(|a| a as Foo::<i32>);
+    //~^ ERROR unexpected token: `::`
+    //~| HELP use `<...>` instead of `::<...>` if you meant to specify type arguments
+
+    let g: Foo::<i32> = Foo { _a: 42 };
+    //~^ ERROR unexpected token: `::`
+    //~| HELP use `<...>` instead of `::<...>` if you meant to specify type arguments
+}