Fatal exceptions running JoystickList

[ess-gsmith]

Uncaught exceptions in SDL_Joysticks.cpp for SDL_JOYAXISMOTION, SDL_CONTROLLERAXISMOTION, and SDL_JOYBUTTON* events.

Fault: ASSERT failure in QList::operator[]: "index out of range", file C:\app\Qt\5.15.0\msvc2019_64\include\QtCore/qlist.h, line 579 C:\app\Qt\5.15.0\msvc2019_64\include\QtCore/qlist.h: 579

Example:
In SDL_Joysticks::getAxisEvent():
event.joystick->axes[event.axis] = event.value;

event.joystick->axes.size() == 3
event.axis == 4

Windows 10
Qt 5.15.0 - MSVC 2019
CH Flightstick joystick
Debug mode