1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/reentrant-RegExp-creation-and-gc-during-new-RegExp-pattern-ToString.js b/js/src/tests/non262/extensions/reentrant-RegExp-creation-and-gc-during-new-RegExp-pattern-ToString.js
new file mode 100644
index 0000000000..0ec0b493e4
--- /dev/null
+++ b/js/src/tests/non262/extensions/reentrant-RegExp-creation-and-gc-during-new-RegExp-pattern-ToString.js
@@ -0,0 +1,41 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs gc (newGlobal/evaluate are shimmed)
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var gTestfile =
+  "reentrant-RegExp-creation-and-gc-during-new-RegExp-pattern-ToString.js";
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 1253099;
+var summary =
+  "Don't assert when, in |new RegExp(pat)|, stringifying |pat| creates " +
+  "another RegExp and then performs a GC";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+// The fresh global object is required to ensure that the outer |new RegExp|
+// is the first RegExp created in the global (other than RegExp.prototype).
+newGlobal().evaluate(`
+var createsRegExpAndCallsGCWhenStringified =
+  {
+    toString: function() {
+      new RegExp("a");
+      gc();
+      return "q";
+    }
+  };
+
+assertEq(new RegExp(createsRegExpAndCallsGCWhenStringified).source, "q");
+`);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");