1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-06.js b/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-06.js
new file mode 100644
index 0000000000..e7ecab1754
--- /dev/null
+++ b/js/src/jit-test/tests/debug/onEnterFrame-async-resumption-06.js
@@ -0,0 +1,49 @@
+// A Debugger can {return:} from the first onEnterFrame for an async function.
+// (The exact behavior is undocumented; we're testing that it doesn't crash.)
+
+ignoreUnhandledRejections();
+
+let g = newGlobal({newCompartment: true});
+g.eval(`async function f(x) { await x; return "ponies"; }`);
+g.eval(`async function f2(x) { await x; return "moar ponies"; }`);
+
+let dbg = new Debugger;
+let gw = dbg.addDebuggee(g);
+let hits = 0;
+let resumption = undefined;
+let savedAsyncGen = undefined;
+dbg.onEnterFrame = frame => {
+    if (frame.type == "call" && frame.callee.name === "f2") {
+        frame.onPop = completion => {
+            if (savedAsyncGen === undefined) {
+                savedAsyncGen = completion.return;
+            }
+        };
+    }
+    if (frame.type == "call" && frame.callee.name === "f") {
+        frame.onPop = completion => {
+            hits++;
+        };
+
+        return {return: savedAsyncGen};
+    }
+};
+
+let p2 = g.f2(0);
+let p = g.f(0);
+
+assertEq(hits, 1);
+
+drainJobQueue();
+
+assertEq(hits, 1);
+
+let pw2 = gw.makeDebuggeeValue(p2);
+assertEq(pw2.isPromise, true);
+assertEq(pw2.promiseState, "fulfilled");
+assertEq(pw2.promiseValue, "moar ponies");
+
+let pw = gw.makeDebuggeeValue(p);
+assertEq(pw.isPromise, true);
+assertEq(pw.promiseState, "fulfilled");
+assertEq(pw.promiseValue, "moar ponies");