Bug 1346862 - Fix IteratorClose due to non-local jumps being catchable by try statements inside for-of

Issue #74

1 files changed, 35 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js b/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js
new file mode 100644
index 000000000..1974e416b
--- /dev/null
+++ b/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js
@@ -0,0 +1,35 @@
+function test() {
+    var returnCalled = 0;
+    var returnCalledExpected = 0;
+    var catchEntered = 0;
+    var finallyEntered = 0;
+    var finallyEnteredExpected = 0;
+    var iterable = {};
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            throw 42;
+        }
+    });
+
+    // inner try cannot catch IteratorClose throwing
+    assertThrowsValue(function() {
+        for (var x of iterable) {
+            try {
+                return;
+            } catch (e) {
+                catchEntered++;
+            } finally {
+                finallyEntered++;
+            }
+        }
+    }, 42);
+    assertEq(returnCalled, ++returnCalledExpected);
+    assertEq(catchEntered, 0);
+    assertEq(finallyEntered, ++finallyEnteredExpected);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);