1 files changed, 15 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/regexp/bug1640479.js b/js/src/jit-test/tests/regexp/bug1640479.js
new file mode 100644
index 0000000000..ff166d6451
--- /dev/null
+++ b/js/src/jit-test/tests/regexp/bug1640479.js
@@ -0,0 +1,15 @@
+// |jit-test| skip-if: !('oomTest' in this)
+
+var failures = 0;
+var i = 0;
+
+function foo() {
+    var e;
+    var r = RegExp("(?<_" + (i++) + "a>)");
+    try { e = r.exec("a"); } catch {}
+    e = r.exec("a");
+    if (e.groups === undefined) failures++;
+}
+
+oomTest(foo);
+assertEq(failures, 0);