1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/regexp/named-capture-proxy.js b/js/src/jit-test/tests/regexp/named-capture-proxy.js
new file mode 100644
index 0000000000..e7cc933850
--- /dev/null
+++ b/js/src/jit-test/tests/regexp/named-capture-proxy.js
@@ -0,0 +1,21 @@
+var access_log = "";
+const handler = {
+    get: function(obj, prop) {
+        access_log += prop + ",";
+        return prop in obj ? obj[prop] : "<filled by proxy>";
+    }
+};
+
+class ProxiedGroupRegExp extends RegExp {
+    exec(s) {
+        var result = super.exec(s);
+        if (result) {
+            result.groups = new Proxy(result.groups, handler);
+        }
+        return result;
+    }
+}
+
+let re = new ProxiedGroupRegExp("(?<x>.)");
+assertEq("a".replace(re, "$<x> $<y>"), "a <filled by proxy>");
+assertEq(access_log, "x,y,")