arduino-lorawan: Kernel panic on Arduino v2.0

The library worked fine on Arduino 1.0.6, but after upgrading to v2.0.0 the device reboots on the next loop cycle after calling Arduino_LoRaWAN::SendBuffer(). I have a Lora wrapper class which simply calls Arduino_LoRaWAN::loop() - it is failing at this point.

environment:

• Version 0.9.1
• Ardunio v2.0.0 (I also tried the mem-optimized branch)
• PlatformIO on Windows 10
• Heltec Wireless Stick v1.2

code

void Lora::NetBeginRegionInit() {
    this->Super::NetBeginRegionInit();
}

void Lora::NetJoin() {
    this->Super::NetJoin();
    SetLinkCheckMode(true);
    LMIC_setPingable(4);
}

void Lora::NetTxComplete() {
    this->Super::NetTxComplete();
}

bool Lora::GetOtaaProvisioningInfo(OtaaProvisioningInfo *pInfo) {
    if (pInfo != nullptr) {
        memcpy_P(pInfo->AppKey, APPKEY, sizeof(pInfo->AppKey));
        memcpy_P(pInfo->DevEUI, DEVEUI, sizeof(pInfo->DevEUI));
        memcpy_P(pInfo->AppEUI, APPEUI, sizeof(pInfo->AppEUI));
    }
    return true;
}

void Lora::loop() {
    if (!enabled) return;
    Super::loop(); // <-- Failing here
}

• My application flow is:

// these are called in setup
begin(&pinMap);
os_setCallback(&basicStatePublishJob, processLMICCallback);

// ... then 'basicStatePublishJob' calls SendBuffer
SendBuffer(dataBuffer, dataBuffer_s, pDoneFn, (void *)this, /*confirmed*/ 0, /*port*/ 1);

core dump

Guru Meditation Error: Core  1 panic'ed (LoadStoreError). Exception was unhandled.

Core  1 register dump:
PC      : 0x400f4ed7  PS      : 0x00060030  A0      : 0x800f4f55  A1      : 0x3ffce000
A2      : 0x4002f56e  A3      : 0x00000000  A4      : 0x00000000  A5      : 0x0013a16a  
A6      : 0xfffffffc  A7      : 0x00000003  A8      : 0x00000000  A9      : 0x3ffc7c18
A10     : 0x00000010  A11     : 0x00000016  A12     : 0x00000000  A13     : 0x00040df7  
A14     : 0x63ffffff  A15     : 0x00000003  SAR     : 0x0000001b  EXCCAUSE: 0x00000003
EXCVADDR: 0x4002f56e  LBEG    : 0x400f4e88  LEND    : 0x400f4ee6  LCOUNT  : 0x00000004  

0x400f4ed4: Arduino_LoRaWAN::BuildSessionState(Arduino_LoRaWAN::SessionState_u&) const at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/Arduino_LoRaWAN.h:369
 (inlined by) ?? at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/Arduino_LoRaWAN.h:359
 (inlined by) Arduino_LoRaWAN::BuildSessionState(Arduino_LoRaWAN::SessionState_u&) const at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_sessionstate.cpp:114
0x400f4f52: Arduino_LoRaWAN::SaveSessionState() at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_sessionstate.cpp:190
0x400f4b0b: Arduino_LoRaWAN::StandardEventProcessor(unsigned int) at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/Arduino_LoRaWAN.h:925
 (inlined by) Arduino_LoRaWAN::StandardEventProcessor(unsigned int) at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_begin.cpp:214
0x400f4be2: Arduino_LoRaWAN::DispatchEvent(unsigned int) at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_begin.cpp:123
0x400f4c24: onEvent at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_begin.cpp:109
0x400f07fd: reportEventNoUpdate at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI LoRaWAN LMIC library/src/lmic/lmic.c:481
0x400f1d3d: reportEventAndUpdate at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI LoRaWAN LMIC library/src/lmic/lmic.c:466
0x400f203a: startJoining at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI LoRaWAN LMIC library/src/lmic/lmic.c:2142
0x400f308c: os_runloop_once at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI LoRaWAN LMIC library/src/lmic/oslmic.c:157
0x400f4d6b: Arduino_LoRaWAN::loop() at F:\myproject/.pio/libdeps/heltec_wireless_stick/MCCI Arduino LoRaWAN Library/src/lib/arduino_lorawan_loop.cpp:42
0x400d5c03: Lora::loop() at F:\myproject/src/lora.cpp:156
0x400d680e: loop() at F:\myproject/src/main.cpp:196
0x400fb8c4: loopTask(void*) at C:/Users/Oliver/.platformio/packages/framework-arduinoespressif32/cores/esp32/main.cpp:46

Related source code

https://github.com/mcci-catena/arduino-lorawan/blob/caceeb49b1f5520d11668aeb7c587ef1a96ca9ad/src/lib/arduino_lorawan_sessionstate.cpp#L190

https://github.com/mcci-catena/arduino-lorawan/blob/caceeb49b1f5520d11668aeb7c587ef1a96ca9ad/src/lib/arduino_lorawan_sessionstate.cpp#L114

https://github.com/mcci-catena/arduino-lorawan/blob/caceeb49b1f5520d11668aeb7c587ef1a96ca9ad/src/Arduino_LoRaWAN.h#L359-L371