1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/map/proxy-abrupt-completion-in-iteratorValue.js b/js/src/tests/non262/Iterator/prototype/map/proxy-abrupt-completion-in-iteratorValue.js
new file mode 100644
index 0000000000..f50bd0da10
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/map/proxy-abrupt-completion-in-iteratorValue.js
@@ -0,0 +1,55 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+//
+
+/*---
+esid: pending
+description: %Iterator.prototype%.map does not call return when IteratorValue returns an abrupt completion.
+info: >
+features: [iterator-helpers]
+---*/
+
+const handlerProxy = log => new Proxy({}, {
+  get: (target, key, receiver) => (...args) => {
+    const target = args[0];
+    const item = Reflect[key](...args);
+
+    log.push(`${key}: ${args.filter(x => typeof x != 'object').map(x => x.toString())}`);
+
+    switch (typeof item) {
+      case 'function': return item.bind(new Proxy(target, handlerProxy(log)));
+      case 'object': return new Proxy(item, handlerProxy(log));
+      default: return item;
+    }
+  },
+});
+
+const log = [];
+const iterator = Object.setPrototypeOf({
+  next: function() {
+    throw 'error';
+    return { done: false, value: 0 };
+  },
+  return: function(value) {
+    log.push('close iterator');
+    return { done: true, value };
+  },
+}, Iterator.prototype);
+const iteratorProxy = new Proxy(iterator, handlerProxy(log));
+const mappedProxy = iteratorProxy.map(x => x);
+
+try {
+  mappedProxy.next();
+} catch (exc) {
+  assertEq(exc, 'error');
+}
+
+console.log(log.join('\n'));
+
+assertEq(
+  log.join('\n'),
+`get: map
+get: next`
+);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);