Stacktrace was interesting, while looking up an icon, there might be a theme-changed signal and therefore our callback is called. However before we lookup an icon, we unreference the last icon but don't set it to NULL, and hence the callback accesses and invalid pointer.
Stacktrace was interesting, while looking up an icon, there might be a theme-changed signal and therefore our callback is called. However before we lookup an icon, we unreference the last icon but don't set it to NULL, and hence the callback accesses and invalid pointer.