Add m-esr52 at 52.6.0

1 files changed, 12 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyKeys6.js b/js/src/jit-test/tests/proxy/testDirectProxyKeys6.js
new file mode 100644
index 000000000..00d97cbbc
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyKeys6.js
@@ -0,0 +1,12 @@
+load(libdir + "asserts.js");
+
+// Throw a TypeError if the trap skips a non-configurable enumerable property
+var target = {};
+Object.defineProperty(target, 'foo', {
+    enumerable: true,
+    configurable: false
+});
+
+var handler = { ownKeys: () => [] };
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy])
+    assertThrowsInstanceOf(() => Object.keys(p), TypeError);