Read access violation.

[xland]

When I close a window in a multi-window application,
I try to release resources with the following code.

// WindowBase is the base class of all windows
// One window may has multiple documents
WindowBase::~WindowBase() {
	Rml::RemoveContext(windowName);
	Rml::ReleaseTextures(renderInterface);
	delete renderInterface;
	glfwDestroyWindow(glfwWindow);
}

VisualStudio prompts me that there is an exception with the following RmlUi code

// Core\EventDispatcher.cpp
// Detaches all events from this dispatcher and all child dispatchers.
void EventDispatcher::DetachAllEvents()
{
	for (const auto& event : listeners)
		event.listener->OnDetach(element);   // This line has exception
	listeners.clear();
	for (int i = 0; i < element->GetNumChildren(true); ++i)
		element->GetChild(i)->GetEventDispatcher()->DetachAllEvents();
}

The exception is:

Read access violation.
event.listener-> is 0xFFFFFFFFFFFFFFE7。

The event and element both have value.

What's wrong with my code, Thanks very much!

[barotto]

Make sure event listeners attached to any element of documents in the context are kept alive until the call to Rml::RemoveContext().

[xland]

Yes!
Problem solved,
Thank you very much!