1 files changed, 21 insertions, 0 deletions
diff --git a/test/js-unittest/b_147664838.js b/test/js-unittest/b_147664838.js
new file mode 100644
index 0000000..d1d8b72
--- /dev/null
+++ b/test/js-unittest/b_147664838.js
@@ -0,0 +1,21 @@
+function FindProxyForURL(url, host){
+  let re = /x/y;
+  let cnt = 0;
+  let str = re[Symbol.replace]("x", {
+    toString: () => {
+      cnt++;
+      if (cnt == 2) {
+        re.lastIndex = {valueOf: () => {
+          re.x = 42;
+          return 0;
+        }};
+      }
+      return 'y$';
+    }
+  });
+  if (str != "y$") {
+    throw "regex mutated";
+    return "FAIL";
+  }
+  return "DIRECT";
+}
+\ No newline at end of file