1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/built-ins/RegExp/RegExp-control-escape-russian-letter.js b/js/src/tests/test262/annexB/built-ins/RegExp/RegExp-control-escape-russian-letter.js
new file mode 100644
index 0000000000..b7caeb42a5
--- /dev/null
+++ b/js/src/tests/test262/annexB/built-ins/RegExp/RegExp-control-escape-russian-letter.js
@@ -0,0 +1,55 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "CharacterEscape :: c ControlLetter"
+es5id: 15.10.2.10_A2.1_T3
+es6id: B.1.4
+description: >
+  "ControlLetter :: RUSSIAN ALPHABET is incorrect"
+  Instead, fall back to semantics to match literal "\\c"
+features: [generators]
+---*/
+
+function* invalidControls() {
+  // Check upper case Cyrillic
+  for (var alpha = 0x0410; alpha <= 0x042F; alpha++) {
+    yield String.fromCharCode(alpha);
+  }
+
+  // Check lower case Cyrillic
+  for (alpha = 0x0430; alpha <= 0x044F; alpha++) {
+    yield String.fromCharCode(alpha);
+  }
+
+  // Check ASCII characters which are not in the extended range or syntax
+  // characters
+  for (alpha = 0x00; alpha <= 0x7F; alpha++) {
+    let letter = String.fromCharCode(alpha);
+    if (!letter.match(/[0-9A-Za-z_\$(|)\[\]\/\\^]/)) {
+      yield letter;
+    }
+  }
+
+  // Check for end of string
+  yield "";
+}
+
+for (let letter of invalidControls()) {
+  var source = "\\c" + letter;
+  var re = new RegExp(source);
+
+  if (letter.length > 0) {
+    var char = letter.charCodeAt(0);
+    var str = String.fromCharCode(char % 32);
+    var arr = re.exec(str);
+    assert.sameValue(arr, null, `Character ${letter} unreasonably wrapped around as a control character`);
+  }
+  arr = re.exec(source.substring(1));
+  assert.sameValue(arr, null, `invalid \\c escape matched c rather than \\c when followed by ${letter}`);
+
+  arr = re.exec(source);
+  assert.notSameValue(arr, null, `invalid \\c escape failed to match \\c when followed by ${letter}`);
+}
+
+reportCompare(0, 0);