Adding upstream version 127.0.upstream/127.0

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

1 files changed, 39 insertions, 0 deletions

diff --git a/js/src/tests/test262/built-ins/TypedArray/from/iterated-array-changed-by-tonumber.js b/js/src/tests/test262/built-ins/TypedArray/from/iterated-array-changed-by-tonumber.js
new file mode 100644
index 0000000000..a0d6099170
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/from/iterated-array-changed-by-tonumber.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2024 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-%typedarray%.from
+description: >
+  Modifications to input array after iteration are handled correctly.
+info: |
+  %TypedArray%.from ( source [ , mapfn [ , thisArg ] ] )
+
+  ...
+  6. If usingIterator is not undefined, then
+    a. Let values be ? IteratorToList(? GetIteratorFromMethod(source, usingIterator)).
+    b. Let len be the number of elements in values.
+    ...
+    e. Repeat, while k < len,
+      ...
+      vi. Perform ? Set(targetObj, Pk, mappedValue, true).
+      ...
+features: [TypedArray]
+---*/
+
+let values = [0, {
+  valueOf() {
+    // Removes all array elements. Caller must have saved all elements.
+    values.length = 0;
+    return 100;
+  }
+}, 2];
+
+// `from` called with array which uses the built-in array iterator.
+let ta = Int32Array.from(values);
+
+assert.sameValue(ta.length, 3);
+assert.sameValue(ta[0], 0);
+assert.sameValue(ta[1], 100);
+assert.sameValue(ta[2], 2);
+
+reportCompare(0, 0);