1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/non262/ReadableStream/bug-1549768.js b/js/src/tests/non262/ReadableStream/bug-1549768.js
new file mode 100644
index 0000000000..747cb895a9
--- /dev/null
+++ b/js/src/tests/non262/ReadableStream/bug-1549768.js
@@ -0,0 +1,18 @@
+// |reftest| skip-if(!this.hasOwnProperty('ReadableStream'))
+
+var otherGlobal = newGlobal({ newCompartment: true });
+var obj = { start(c) { } };
+var Cancel = otherGlobal.ReadableStream.prototype.tee.call(new ReadableStream(obj))[0].cancel;
+
+var stream = new ReadableStream(obj);
+var [branch1, branch2] = ReadableStream.prototype.tee.call(stream);
+
+Cancel.call(branch1, {});
+
+gczeal(2, 1);
+
+Cancel.call(branch2, {});
+
+if (typeof reportCompare === 'function') {
+  reportCompare(0, 0);
+}