1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/promise/no-reentrant-drainjobqueue.js b/js/src/jit-test/tests/promise/no-reentrant-drainjobqueue.js
new file mode 100644
index 000000000..7db07bdc7
--- /dev/null
+++ b/js/src/jit-test/tests/promise/no-reentrant-drainjobqueue.js
@@ -0,0 +1,10 @@
+let thenCalled = false;
+let p1 = new Promise(res => res('result')).then(val => {
+    Promise.resolve(1).then(_=>{thenCalled = true;});
+    // This reentrant call is ignored.
+    drainJobQueue();
+    assertEq(thenCalled, false);
+});
+
+drainJobQueue();
+assertEq(thenCalled, true);