1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/map/clobber-symbol.js b/js/src/tests/non262/Iterator/prototype/map/clobber-symbol.js
new file mode 100644
index 0000000000..8d5b2721e1
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/map/clobber-symbol.js
@@ -0,0 +1,22 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator')) -- Iterator is not enabled unconditionally
+//
+//
+
+/*---
+esid: pending
+description: %Iterator.prototype%.map works even if the global Symbol has been clobbered..
+info: 
+features: [iterator-helpers, Symbol, Symbol.iterator]
+---*/
+
+Symbol = undefined;
+assertThrowsInstanceOf(() => Symbol.iterator, TypeError);
+
+const iterator = [0].values();
+assertEq(
+  iterator.map(x => x + 1).next().value, 1,
+  '`%Iterator.prototype%.map` still works after Symbol has been clobbered'
+);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);