1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/flags-tostring-error.js b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/flags-tostring-error.js
new file mode 100644
index 0000000000..57faa2b888
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/prototype/Symbol.match/flags-tostring-error.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2022 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Errors thrown by converting `flags` to string are forwarded to the runtime
+esid: sec-regexp.prototype-@@match
+info: |
+    1. Let _rx_ be the *this* value.
+    2. If Type(_rx_) is not Object, throw a *TypeError* exception.
+    3. Let _S_ be ? ToString(_string_).
+    4. Let _flags_ be ? ToString(? Get(_rx_, *"flags"*)).
+features: [Symbol.match]
+---*/
+
+function CustomError() {}
+var toStringThrows = {
+  [Symbol.toPrimitive](hint) {
+    if (hint === 'string') {
+      throw new CustomError();
+    }
+    throw new Test262Error('@@toPrimitive should be called with hint "string"');
+  },
+  get toString() { throw new Test262Error('toString property should not be read'); },
+  get valueOf() { throw new Test262Error('valueOf property should not be read'); }
+};
+
+var re = /./;
+Object.defineProperties(re, {
+  flags: {
+    get() { return toStringThrows; }
+  },
+  global: {
+    get() { throw new Test262Error('global property should not be read'); }
+  },
+  unicode: {
+    get() { throw new Test262Error('unicode property should not be read'); }
+  }
+});
+
+assert.throws(CustomError, function() {
+  re[Symbol.match]('');
+});
+
+reportCompare(0, 0);