1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/non262/lexical-environment/block-scoped-functions-annex-b-property.js b/js/src/tests/non262/lexical-environment/block-scoped-functions-annex-b-property.js
new file mode 100644
index 0000000000..a295de5081
--- /dev/null
+++ b/js/src/tests/non262/lexical-environment/block-scoped-functions-annex-b-property.js
@@ -0,0 +1,18 @@
+// |reftest| skip-if(!xulRuntime.shell)
+
+// Define a global getter without a setter.
+Object.defineProperty(this, "x", {
+  get: function () { return "get-x"; },
+  configurable: true
+});
+
+// Simulate loading a 2nd script with evaluate, else we would DEFVAR the x and
+// the above defineProperty would fail in trying to redefine a non-configurable
+// property on the global.
+evaluate(`{
+  function x() { return "fun-x"; }
+}`);
+
+// Annex B is supposed to be like an assignment. Should not blow away the
+// existing setter-less getter.
+reportCompare(x, "get-x");