Address Sanitizer reports new-delete-type-mismatch

I originally found this issue in QGroundControl which is an open source project. You can see my original report at https://github.com/mavlink/qgroundcontrol/issues/9626

I found that the issue is trivially reproducible with the `mapviewer` example.

1. Configure `qmake` with `CONFIG+=sanitizer CONFIG+=sanitize_address`
2. Build `mapviewer` example
3. Run `mapviewer` example
4. Rapidly click around the map after it has loaded.
5. Address Sanitizer kills the application and writes a report to the Application Output tab.