Merge pull request #2864 from antlr/fix-javascript-NPE

Fix a NPE
antlr · Jul 12, 2020 · eb1adaa · eb1adaa
2 parents 3d9351f + 2bfce77
commit eb1adaa
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/runtime/JavaScript/src/antlr4/Utils.js b/runtime/JavaScript/src/antlr4/Utils.js
@@ -66,11 +66,11 @@ String.prototype.hashCode = function () {
 };
 
 function standardEqualsFunction(a, b) {
-    return a.equals(b);
+    return a ? a.equals(b) : a==b;
 }
 
 function standardHashCodeFunction(a) {
-    return a.hashCode();
+    return a ? a.hashCode() : -1;
 }
 
 class Set {