Add m-esr52 at 52.6.0

1 files changed, 8 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/for-of/semantics-05.js b/js/src/jit-test/tests/for-of/semantics-05.js
new file mode 100644
index 000000000..be5bd7f6e
--- /dev/null
+++ b/js/src/jit-test/tests/for-of/semantics-05.js
@@ -0,0 +1,8 @@
+// Deleting String.prototype.iterator makes for-of stop working on strings.
+
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+
+delete String.prototype[Symbol.iterator];
+assertThrowsInstanceOf(function () { for (var v of "abc") ; }, TypeError);
+assertThrowsInstanceOf(function () { for (var v of new String("abc")) ; }, TypeError);