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-rw-r--r--js/src/tests/non262/operators/instanceof-bound-function-recursion.js23
1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/non262/operators/instanceof-bound-function-recursion.js b/js/src/tests/non262/operators/instanceof-bound-function-recursion.js
new file mode 100644
index 0000000000..133b84f2f9
--- /dev/null
+++ b/js/src/tests/non262/operators/instanceof-bound-function-recursion.js
@@ -0,0 +1,23 @@
+function f() {}
+
+var fn = f;
+for (var i = 0; i < 100000; ++i) {
+ fn = fn.bind();
+
+ // Ensure we don't fallback to @@hasInstance from %FunctionPrototype%.
+ Object.defineProperty(fn, Symbol.hasInstance, {
+ value: undefined, writable: true, enumerable: true, writable: true
+ });
+
+ // Prevent generating overlong names of the form "bound bound bound [...] f".
+ Object.defineProperty(fn, "name", {
+ value: "", writable: true, enumerable: true, writable: true
+ });
+}
+
+assertThrowsInstanceOf(
+ () => ({}) instanceof fn,
+ Error,
+ "detect runaway recursion delegating instanceof to bound function target");
+
+reportCompare(0, 0);