From 7b49c7d743beebc0f1f9dffcdfee8dab8b8c51ed Mon Sep 17 00:00:00 2001
From: Thomas Lively <tlively@google.com>
Date: Tue, 7 Jan 2020 07:03:45 -0800
Subject: [PATCH] Update LLVM to fix crash on Emscripten targets

Adds a small Rust regression test for #66308.

r? @alexcrichton
---
 src/test/ui/issues/issue-66308.rs | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 src/test/ui/issues/issue-66308.rs

diff --git a/src/test/ui/issues/issue-66308.rs b/src/test/ui/issues/issue-66308.rs
new file mode 100644
index 000000000000..5dc9378422cf
--- /dev/null
+++ b/src/test/ui/issues/issue-66308.rs
@@ -0,0 +1,8 @@
+// build-pass
+// compile-flags: --crate-type lib
+
+// Regression test for LLVM crash affecting Emscripten targets
+
+pub fn foo() {
+    (0..0).rev().next();
+}