nodemcu keep crashing

[JackMai123]

loaded the msdn_test.ino from the example into my nodemcu and it is keep crashing. any idea why it is crashing?

0x40201e24 in mdns::nameFromDnsPointer(char*, int, int, unsigned char const*, int, bool) at ??:? 0x40201f2a in mdns::MDns::PopulateAnswerResult(mdns::Answer*) at ??:? 0x402011ac in answerCallback(mdns::Answer const*) at ??:? 0x40203006 in yield at ??:? 0x402020ef in mdns::MDns::Parse_Answer(mdns::Answer&) at ??:? 0x402022d9 in mdns::MDns::loop() at ??:? 0x4010015c in ets_post at ??:? 0x40103f31 in lmacIsIdle at ??:? 0x4010015c in ets_post at ??:? 0x4010015c in ets_post at ??:? 0x4010512b in lmacRxDone at ??:? 0x40101e94 in pp_post at ??:? 0x4010512b in lmacRxDone at ??:? 0x40101e94 in pp_post at ??:? 0x40102a1f in rcReachRetryLimit at ??:? 0x40102bfc in rcReachRetryLimit at ??:? 0x40102bfc in rcReachRetryLimit at ??:? 0x401030b6 in wDev_ProcessFiq at ??:? 0x40201411 in loop at ??:? 0x4020319c in loop_wrapper() at core_esp8266_main.cpp:? 0x40100d15 in cont_wrapper at ??:?