From d317039b222f0c73f80434f8d248f8adb19e3fdd Mon Sep 17 00:00:00 2001
From: Brian Koropoff <bkoropoff@gmail.com>
Date: Thu, 6 Nov 2014 00:06:28 -0800
Subject: [PATCH] Add regression test for #18661

---
 src/test/run-pass/issue-18661.rs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src/test/run-pass/issue-18661.rs

diff --git a/src/test/run-pass/issue-18661.rs b/src/test/run-pass/issue-18661.rs
new file mode 100644
index 0000000000000..6a2f73a787a48
--- /dev/null
+++ b/src/test/run-pass/issue-18661.rs
@@ -0,0 +1,28 @@
+// 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.
+
+// Test that param substitutions from the correct environment are
+// used when translating unboxed closure calls.
+
+#![feature(unboxed_closures)]
+
+pub fn inside<F: Fn()>(c: F) {
+    c.call(());
+}
+
+// Use different number of type parameters and closure type to trigger
+// an obvious ICE when param environments are mixed up
+pub fn outside<A,B>() {
+    inside(|&:| {});
+}
+
+fn main() {
+    outside::<(),()>();
+}