1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/stream/reader-closedPromise-handled-2.js b/js/src/jit-test/tests/stream/reader-closedPromise-handled-2.js
new file mode 100644
index 0000000000..0525ff91ee
--- /dev/null
+++ b/js/src/jit-test/tests/stream/reader-closedPromise-handled-2.js
@@ -0,0 +1,34 @@
+// |jit-test| skip-if: !this.hasOwnProperty("ReadableStream")
+// Releasing a reader should not result in a promise being tracked as
+// unhandled.
+
+function test(readable) {
+  // Create an errored stream.
+  let controller;
+  let stream = new ReadableStream({
+    start(c) {
+      controller = c;
+    }
+  });
+  drainJobQueue();
+
+  // Track promises.
+  let status = new Map;
+  setPromiseRejectionTrackerCallback((p, x) => { status.set(p, x); });
+
+  // Per Streams spec 3.7.5 step 5, this creates a rejected promise
+  // (reader.closed) but marks it as handled.
+  let reader = stream.getReader();
+  if (!readable) {
+    controller.close();
+  }
+  reader.releaseLock();
+
+  // Check that the promise's status is not 0 (unhandled);
+  // it may be either 1 (handled) or undefined (never tracked).
+  let result = status.get(reader.closed);
+  assertEq(result === 1 || result === undefined, true);
+}
+
+test(true);
+test(false);