From e7841ab5d740eb70f2975212de4a1066d8714438 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Thu, 27 Feb 2020 20:09:26 +0100
Subject: Issue #1465 - Implement optional catch binding.

---
 js/src/frontend/NameFunctions.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'js/src/frontend/NameFunctions.cpp')

diff --git a/js/src/frontend/NameFunctions.cpp b/js/src/frontend/NameFunctions.cpp
index 376be7624..db70bb5b4 100644
--- a/js/src/frontend/NameFunctions.cpp
+++ b/js/src/frontend/NameFunctions.cpp
@@ -651,8 +651,10 @@ class NameResolver
           // contain arbitrary expressions.
           case PNK_CATCH:
             MOZ_ASSERT(cur->isArity(PN_TERNARY));
-            if (!resolve(cur->pn_kid1, prefix))
-                return false;
+            if (cur->pn_kid1) {
+                if (!resolve(cur->pn_kid1, prefix))
+                    return false;
+            }
             if (cur->pn_kid2) {
                 if (!resolve(cur->pn_kid2, prefix))
                     return false;
-- 
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