1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/stream/bug-1503399-1.js b/js/src/jit-test/tests/stream/bug-1503399-1.js
new file mode 100644
index 0000000000..fb3cdac44f
--- /dev/null
+++ b/js/src/jit-test/tests/stream/bug-1503399-1.js
@@ -0,0 +1,18 @@
+// Don't assert if the wrapper that's the value of stream.[[reader]] gets nuked.
+
+load(libdir + "asserts.js");
+
+ignoreUnhandledRejections();
+
+let g = newGlobal({newCompartment: true});
+let stream = new ReadableStream({
+    start(controller) {
+        controller.enqueue("ponies");
+        controller.close();
+    }
+});
+g.stream = stream;
+g.eval("var reader = ReadableStream.prototype.getReader.call(stream);");
+nukeCCW(g.reader);
+assertErrorMessage(() => g.eval("reader.read()"), g.TypeError, "can't access dead object");
+g.eval("reader.releaseLock();");