From 1010e63cafff8bff18d9d42204fbcbc05bdfe350 Mon Sep 17 00:00:00 2001
From: Mathias Bynens <mathias@qiwi.be>
Date: Wed, 26 Apr 2023 11:36:58 +0200
Subject: [PATCH] Add tests for RegExp `v` flag errors that were allowed with
 `u`

https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag

Issue: #3496
Issue: https://github.com/tc39/proposal-regexp-v-flag/issues/52
---
 .../breaking-change-from-u-to-v-01.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-02.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-03.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-04.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-05.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-06.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-07.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-08.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-09.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-10.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-11.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-12.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-13.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-14.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-15.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-16.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-17.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-18.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-19.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-20.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-21.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-22.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-23.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-24.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-25.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-26.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-27.js         | 19 +++++++++++++++++++
 .../breaking-change-from-u-to-v-28.js         | 19 +++++++++++++++++++
 28 files changed, 532 insertions(+)
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-01.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-02.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-03.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-04.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-05.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-06.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-07.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-08.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-09.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-10.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-11.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-12.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-13.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-14.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-15.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-16.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-17.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-18.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-19.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-20.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-21.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-22.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-23.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-24.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-25.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-27.js
 create mode 100644 test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-28.js

diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-01.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-01.js
new file mode 100644
index 0000000000..056d772473
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-01.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[(]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-02.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-02.js
new file mode 100644
index 0000000000..188f074515
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-02.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[)]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-03.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-03.js
new file mode 100644
index 0000000000..a0609ca7ba
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-03.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[[]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-04.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-04.js
new file mode 100644
index 0000000000..13788ae3e3
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-04.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[{]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-05.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-05.js
new file mode 100644
index 0000000000..e71eaa6188
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-05.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[}]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-06.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-06.js
new file mode 100644
index 0000000000..a87709359f
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-06.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[/]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-07.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-07.js
new file mode 100644
index 0000000000..1c1eb55b4d
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-07.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[-]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-08.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-08.js
new file mode 100644
index 0000000000..2713238ae6
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-08.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[|]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-09.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-09.js
new file mode 100644
index 0000000000..ac3b30947e
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-09.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[&&]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-10.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-10.js
new file mode 100644
index 0000000000..2601ab0c35
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-10.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[!!]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-11.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-11.js
new file mode 100644
index 0000000000..e7e9d1934c
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-11.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[##]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-12.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-12.js
new file mode 100644
index 0000000000..3a5706e748
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-12.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[$$]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-13.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-13.js
new file mode 100644
index 0000000000..0694111a1b
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-13.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[%%]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-14.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-14.js
new file mode 100644
index 0000000000..8e2c28a11c
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-14.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[**]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-15.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-15.js
new file mode 100644
index 0000000000..9dfa546445
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-15.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[++]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-16.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-16.js
new file mode 100644
index 0000000000..8f8e42e769
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-16.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[,,]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-17.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-17.js
new file mode 100644
index 0000000000..e3b8baefaa
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-17.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[..]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-18.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-18.js
new file mode 100644
index 0000000000..229ac0d71d
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-18.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[::]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-19.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-19.js
new file mode 100644
index 0000000000..459b24b566
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-19.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[;;]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-20.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-20.js
new file mode 100644
index 0000000000..30256f724c
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-20.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[<<]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-21.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-21.js
new file mode 100644
index 0000000000..48c1d9c4d6
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-21.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[==]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-22.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-22.js
new file mode 100644
index 0000000000..93e103a242
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-22.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[>>]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-23.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-23.js
new file mode 100644
index 0000000000..79ef3b45da
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-23.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[??]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-24.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-24.js
new file mode 100644
index 0000000000..018f9bb909
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-24.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[@@]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-25.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-25.js
new file mode 100644
index 0000000000..a4d71ca91c
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-25.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[``]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js
new file mode 100644
index 0000000000..c6b159f144
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[~~]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-27.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-27.js
new file mode 100644
index 0000000000..09f02ac44d
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-27.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[^^^]/v;
diff --git a/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-28.js b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-28.js
new file mode 100644
index 0000000000..7f84741a6f
--- /dev/null
+++ b/test/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-28.js
@@ -0,0 +1,19 @@
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[_^^]/v;