From e16d6a6c6465d19c6d7091e5b59eb4b4528aa9f8 Mon Sep 17 00:00:00 2001
From: Wesley Wiser <wwiser@gmail.com>
Date: Sun, 21 Jun 2020 19:35:16 -0400
Subject: [PATCH] Fix missing return in `optimization_applies()`

---
 src/librustc_mir/transform/simplify_try.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/librustc_mir/transform/simplify_try.rs b/src/librustc_mir/transform/simplify_try.rs
index 778d19a3da4..97a01de867e 100644
--- a/src/librustc_mir/transform/simplify_try.rs
+++ b/src/librustc_mir/transform/simplify_try.rs
@@ -302,6 +302,7 @@ fn optimization_applies<'tcx>(
     // Verify the assigment chain consists of the form b = a; c = b; d = c; etc...
     if opt_info.field_tmp_assignments.is_empty() {
         trace!("NO: no assignments found");
+        return false;
     }
     let mut last_assigned_to = opt_info.field_tmp_assignments[0].1;
     let source_local = last_assigned_to;