From 11a188a194b0f62945e8bfb76534f7198e08effe Mon Sep 17 00:00:00 2001
From: Yuki Okushi <huyuumi.dev@gmail.com>
Date: Thu, 15 Oct 2020 08:35:29 +0900
Subject: [PATCH] Add test for issue-70944

---
 src/test/ui/traits/issue-70944.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/test/ui/traits/issue-70944.rs

diff --git a/src/test/ui/traits/issue-70944.rs b/src/test/ui/traits/issue-70944.rs
new file mode 100644
index 00000000000..3286de9d5b8
--- /dev/null
+++ b/src/test/ui/traits/issue-70944.rs
@@ -0,0 +1,23 @@
+// check-pass
+// Regression test of #70944, should compile fine.
+
+use std::ops::Index;
+
+pub struct KeyA;
+pub struct KeyB;
+pub struct KeyC;
+
+pub trait Foo: Index<KeyA> + Index<KeyB> + Index<KeyC> {}
+pub trait FooBuilder {
+    type Inner: Foo;
+    fn inner(&self) -> &Self::Inner;
+}
+
+pub fn do_stuff(foo: &impl FooBuilder) {
+    let inner = foo.inner();
+    &inner[KeyA];
+    &inner[KeyB];
+    &inner[KeyC];
+}
+
+fn main() {}