1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/promise/user-activation-propagation.js b/js/src/jit-test/tests/promise/user-activation-propagation.js
new file mode 100644
index 0000000000..5ec28eb3a5
--- /dev/null
+++ b/js/src/jit-test/tests/promise/user-activation-propagation.js
@@ -0,0 +1,19 @@
+function newPromiseCapability() {
+    return {};
+}
+function neverCalled() {}
+function resolveCapability(dIs) {}
+class P extends Promise {
+    constructor(executor) {
+        executor(resolveCapability, neverCalled);
+        var p = async function() {}();
+        p.constructor = {
+            [Symbol.species]: P
+        };
+        return p;
+    }
+}
+var {
+    promise: alwaysPending
+} = newPromiseCapability();
+P.race([alwaysPending]).then(neverCalled, neverCalled);