removeApbChangeCallback() fail while initializing LMIC on ESP32 system

[cyberman54]

With current version of arduino-esp32 a new moduel esp32-hal-cpu.c was introduced, which improved error handling in context with CPU clock switching / management.

If i run my LMIC application on top of this, there is an error showing something goes wrong with removing an application callback handler.

I am not sure yet if this problem ist caused by either LMIC, my application, or the new esp32-hal-cpu.c. I wrote a comment to this issue, maybe someone with deep LMIC knowledge could peek into it to get a clue what's going on. Thanks.

[terrillmoore]

See my comment on espressif/arduino-esp32#3560. I don't think this is an LMIC problem.

[cyberman54]

Solved. This was an arduino-esp32 related problem.