Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 22 insertions, 0 deletions

diff --git a/js/src/tests/test262/built-ins/RegExp/lookBehind/sliced-strings.js b/js/src/tests/test262/built-ins/RegExp/lookBehind/sliced-strings.js
new file mode 100644
index 0000000000..1e3b5f6367
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/lookBehind/sliced-strings.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-assertion
+description: Sliced strings
+info: |
+  Rationale from https://github.com/tc39/test262/pull/999#discussion_r113807747
+
+  Since this test originates from V8, this targets V8's sliced strings, which are used for
+  substrings above a length of 13 characters. I wrote this test for exactly the reason
+  @littledan mentioned. That's why the variable name is called oob_subject. The underlying string
+  backing store extends beyond the actual boundary of the sliced string.
+features: [regexp-lookbehind]
+---*/
+
+var oob_subject = "abcdefghijklmnabcdefghijklmn".slice(14);
+assert.sameValue(oob_subject.match(/(?=(abcdefghijklmn))(?<=\1)a/i), null, "");
+assert.sameValue(oob_subject.match(/(?=(abcdefghijklmn))(?<=\1)a/), null, "");
+assert.sameValue("abcdefgabcdefg".slice(1).match(/(?=(abcdefg))(?<=\1)/), null, "");
+
+reportCompare(0, 0);