From 00febd97c9f1495dae1fd03df64915ca6e4fa914 Mon Sep 17 00:00:00 2001
From: Mihail Stoykov <M.Stoikov@gmail.com>
Date: Mon, 14 Oct 2024 18:42:48 +0300
Subject: [PATCH] WIP to work around #3983

---
 js/eventloop/eventloop.go                          | 11 ++++++++++-
 vendor/github.com/grafana/sobek/builtin_promise.go |  5 ++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/js/eventloop/eventloop.go b/js/eventloop/eventloop.go
index 038326c80ba..3a6ab6efc65 100644
--- a/js/eventloop/eventloop.go
+++ b/js/eventloop/eventloop.go
@@ -124,7 +124,16 @@ func (e *EventLoop) RegisterCallback() (enqueueCallback func(func() error)) {
 			panic("RegisterCallback called twice")
 		}
 		callbackCalled = true
-		e.queue = append(e.queue, f)
+		wrapFunc := func() error {
+			rt := e.vu.Runtime()
+			callable, _ := sobek.AssertFunction(rt.ToValue(f))
+			_, err := callable(nil)
+			// if there is an exception the err will be nil either way
+
+			return err
+		}
+
+		e.queue = append(e.queue, wrapFunc)
 		e.registeredCallbacks--
 		e.lock.Unlock()
 		e.wakeup()
diff --git a/vendor/github.com/grafana/sobek/builtin_promise.go b/vendor/github.com/grafana/sobek/builtin_promise.go
index a4a1255a141..8cb71537d80 100644
--- a/vendor/github.com/grafana/sobek/builtin_promise.go
+++ b/vendor/github.com/grafana/sobek/builtin_promise.go
@@ -598,7 +598,10 @@ func (r *Runtime) getPromise() *Object {
 func (r *Runtime) wrapPromiseReaction(fObj *Object) func(interface{}) {
 	f, _ := AssertFunction(fObj)
 	return func(x interface{}) {
-		_, _ = f(nil, r.ToValue(x))
+		_, err := f(nil, r.ToValue(x))
+		if err != nil {
+			panic(err)
+		}
 	}
 }