1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/property-escapes/loose-matching-04.js b/js/src/tests/test262/built-ins/RegExp/property-escapes/loose-matching-04.js
new file mode 100644
index 0000000000..a217494e04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/property-escapes/loose-matching-04.js
@@ -0,0 +1,19 @@
+// |reftest| error:SyntaxError
+// Copyright 2018 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Loose matching must not be applied when matching properties and values in
+  Unicode property escapes.
+esid: sec-static-semantics-unicodematchproperty-p
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-unicode-property-escapes]
+---*/
+
+$DONOTEVALUATE();
+
+/\p{ASSIGNED}/u;