1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/for-of/throw-during-nested-break.js b/js/src/jit-test/tests/for-of/throw-during-nested-break.js
new file mode 100644
index 0000000000..64e2d182b2
--- /dev/null
+++ b/js/src/jit-test/tests/for-of/throw-during-nested-break.js
@@ -0,0 +1,29 @@
+var progress = "";
+
+function* wrapNoThrow() {
+    let iter = {
+        [Symbol.iterator]() { return this; },
+        next() { return { value: 10, iter: false }; },
+        return() { progress += " throw"; throw "nonsense"; }
+    };
+    for (const i of iter)
+        yield i;
+}
+
+function foo() {
+    try {
+        var badIter = wrapNoThrow();
+        loop: for (var i of badIter) {
+            progress += "outerloop";
+            try {
+                for (i of [1,2,3]) {
+                    progress += " innerloop";
+                    break loop;
+                }
+            } catch (e) { progress += " BAD CATCH"; }
+        }
+    } catch (e) { progress += " goodcatch"; }
+}
+
+foo();
+assertEq(progress, "outerloop innerloop throw goodcatch");