Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/basic/for-in-replace-sparse.js b/js/src/jit-test/tests/basic/for-in-replace-sparse.js
new file mode 100644
index 0000000000..2a89ec6679
--- /dev/null
+++ b/js/src/jit-test/tests/basic/for-in-replace-sparse.js
@@ -0,0 +1,12 @@
+// Array with sparse element (because non-writable).
+var arr = [];
+Object.defineProperty(arr, 0, {writable: false, configurable: true, enumerable: true, value: 0});
+
+for (var p in arr) {
+  // Replace sparse element with dense element.
+  assertEq(p, "0");
+  delete arr[0];
+  arr[0] = 0;
+  arr[1] = 1;
+  arr.reverse();
+}