1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrays/length-set-after-has-sparse.js b/js/src/jit-test/tests/arrays/length-set-after-has-sparse.js
new file mode 100644
index 000000000..44e662661
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/length-set-after-has-sparse.js
@@ -0,0 +1,9 @@
+var arr = [];
+Object.defineProperty(arr, 4, {
+  configurable: true,
+  enumerable: false,
+  writable: false,
+  value: undefined
+});
+for (var y = 0; y < 2; y++)
+  arr.length = 0;