From b2d3daccfa882185cc5565ca82861babc1f64dd2 Mon Sep 17 00:00:00 2001
From: Seiichi Uchida <seuchida@gmail.com>
Date: Thu, 8 Mar 2018 19:08:32 +0900
Subject: [PATCH] Add a test for #2491

---
 tests/source/impls.rs |  5 +++++
 tests/target/impls.rs | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/tests/source/impls.rs b/tests/source/impls.rs
index ca8e486646a1..85e0ef0d42b0 100644
--- a/tests/source/impls.rs
+++ b/tests/source/impls.rs
@@ -152,3 +152,8 @@ impl Foo {
         1
     }
 }
+
+// #2491
+impl<'a, 'b, 'c> SomeThing<Something> for (&'a mut SomethingLong, &'b mut SomethingLong, &'c mut SomethingLong) {
+    fn foo() {}
+}
diff --git a/tests/target/impls.rs b/tests/target/impls.rs
index 91172b39fe59..0bc28acf7eaa 100644
--- a/tests/target/impls.rs
+++ b/tests/target/impls.rs
@@ -217,3 +217,14 @@ impl Foo {
         1
     }
 }
+
+// #2491
+impl<'a, 'b, 'c> SomeThing<Something>
+    for (
+        &'a mut SomethingLong,
+        &'b mut SomethingLong,
+        &'c mut SomethingLong,
+    )
+{
+    fn foo() {}
+}