Exception (29):
epc1=0x4000e1b2 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

>>>stack>>>

ctx: cont
sp: 3ffffb70 end: 3fffffc0 offset: 0190
3ffffd00:  3fffb3fc 00000800 3fff826c 40210351  
3ffffd10:  3fffb3fc 00000001 3fff826c 40210b91  
3ffffd20:  00000000 000001d5 3fff4669 40219ee6  
3ffffd30:  000000c8 ffffffff ffffffff 00000000  
3ffffd40:  00000000 00000000 3ffffe00 00000000  
3ffffd50:  00000000 00326c7c 00000000 00000000  
3ffffd60:  00000000 00000000 00000000 00000000  
3ffffd70:  00000000 3fff0034 3fff0034 3fff0034  
3ffffd80:  3fff0034 3fff0034 3fff0034 3fff0034  
3ffffd90:  3fff0034 3fff0034 3fff0034 40100ab7  
3ffffda0:  0000000d 000001d5 3ffffe30 00000000  
3ffffdb0:  00000000 00000000 3ffef9b8 4022f535  
3ffffdc0:  00000001 00000000 3ffef9b8 00000001  
3ffffdd0:  00000011 00000000 00000000 00326da7  
3ffffde0:  3ffffdac 00000800 3fffacd0 4022f93a  
3ffffdf0:  000001d5 00000000 3ffef9b8 000001d5  
3ffffe00:  000001d5 00000000 3ffef9b8 40211071  
3ffffe10:  3fffacd0 000c000f 80c60065 3fffab8c  
3ffffe20:  0126012f 00000000 3fff0034 00000000  
3ffffe30:  3fff0034 3fff7870 40100338 003268db  
3ffffe40:  3fff4524 00000f2f 00000f2f 40100833  
3ffffe50:  3a493d90 3ffef010 3ffef558 3ffef578  
3ffffe60:  00000000 3ffee84c 3ffef9b8 40213359  
3ffffe70:  00000000 3ffef9b8 3ffef9b8 40213486  
3ffffe80:  3fff7814 3fff3614 00000000 402134b4  
3ffffe90:  000076c0 3ffef010 3ffef010 4020fe13  
3ffffea0:  00000000 3ffef310 3ffef010 4020e5e7  
3ffffeb0:  00000001 3ffef9b8 00000020 40100ab7  
3ffffec0:  3fff7acc 4020c1a1 40206320 402061bc  
3ffffed0:  069a0ecd 3ffef578 3fffff10 4022f535  
3ffffee0:  3a493d5c 3ffef578 00000000 3ffef578  
3ffffef0:  00000000 3ffef9b8 00000000 4020e724  
3fffff00:  00000001 3ffef9b8 3fff3084 4020e7ea  
3fffff10:  3ffefa68 3ffefa6c 0000002f 40100ab7  
3fffff20:  4020e72c 00000000 3ffef578 00000000  
3fffff30:  3fff0034 00000000 3fff3668 00000001  
3fffff40:  3ffefa68 3ffefa6c 00000001 402256a7  
3fffff50:  3ffefa68 3ffefa6c 00000001 40218e28  
3fffff60:  007a1200 2f69c6aa 80fefa00 3fff8300  
3fffff70:  3fff324c 3fff3664 00000020 feefeffe  
3fffff80:  00000000 00000000 00000001 3ffefac0  
3fffff90:  3fffdad0 00000000 3ffefa80 402199d1  
3fffffa0:  3fffdad0 00000000 3ffefa80 40219a07  
3fffffb0:  feefeffe feefeffe 3ffe853c 40100d71  
<<<stack<<<

last failed alloc call: 40210351(2048)


Exception 29: StoreProhibited: A store referenced a page mapped with an attribute that does not permit stores
PC: 0x4000e1b2
EXCVADDR: 0x00000000
Memory allocation of 2048 bytes failed at 0x40210351: UtilsClass::newS(unsigned int) at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src/Utils.h line 254

Decoding stack results
0x40210351: UtilsClass::newS(unsigned int) at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src/Utils.h line 254
0x40210b91: Firebase_Signer::handleTokenResponse() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\signer\Signer.cpp line 839
0x40219ee6: __delay(unsigned long) at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_wiring.cpp line 54
0x40100ab7: free(void*) at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\umm_malloc\umm_malloc.cpp line 398
0x4022f535: operator delete(void*) at /workdir/repo/gcc/libstdc++-v3/libsupc++/del_op.cc line 48
0x4022f93a: std::basic_string  , std::allocator  >::~basic_string() at /workdir/arena.x86_64/gcc/xtensa-lx106-elf/libstdc++-v3/include/bits/basic_string.h line 541
0x40211071: Firebase_Signer::refreshToken() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\signer\Signer.cpp line 559
0x40100338: millis() at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_wiring.cpp line 188
0x40100833: umm_free_core(void*) at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\umm_malloc\umm_malloc.cpp line 351
0x40213359: Firebase_Signer::handleToken() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\signer\Signer.cpp line 219
0x40213486: Firebase_Signer::checkToken() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\signer\Signer.cpp line 1815
0x402134b4: Firebase_Signer::tokenReady() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\signer\Signer.cpp line 1824
0x4020fe13: FirebaseData::tokenReady() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\session\FB_Session.cpp line 689
0x4020e5e7: FB_RTDB::handleStreamRead(FirebaseData*) at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\rtdb\FB_RTDB.cpp line 2215
0x40100ab7: free(void*) at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\umm_malloc\umm_malloc.cpp line 398
0x4020c1a1: std::function ::function    (FB_RTDB*)>, void>(std::_Bind   (FB_RTDB*)>) at c:\users\danhuang\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2/functional line 1342
0x40206320: std::_Function_base::_Base_manager  )::{lambda()#1}>::_M_manager(std::_Any_data&, std::_Function_base::_Base_manager  )::{lambda()#1}> const&, std::_Manager_operation) at c:\users\danhuang\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2/functional line 1931
0x402061bc: std::_Function_handler  )::{lambda()#1}>::_M_invoke(std::_Any_data const&) at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src/Utils.h line 1467
0x4022f535: operator delete(void*) at /workdir/repo/gcc/libstdc++-v3/libsupc++/del_op.cc line 48
0x4020e724: FB_RTDB::readStream(FirebaseData*) at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\rtdb\FB_RTDB.cpp line 2191
0x4020e7ea: FB_RTDB::runStreamTask() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\rtdb\FB_RTDB.cpp line 2470
0x40100ab7: free(void*) at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\umm_malloc\umm_malloc.cpp line 398
0x4020e72c: FB_RTDB::runStreamTask() at C:\Users\DanHuang\Documents\Arduino\libraries\Firebase-ESP-Client\src\rtdb\FB_RTDB.cpp line 2431
0x402256a7: std::_Function_handler    (FB_RTDB*)> >::_M_invoke(std::_Any_data const&) at c:\users\danhuang\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506\xtensa-lx106-elf\include\c++\4.8.2/functional line 2073
0x40218e28: run_scheduled_functions() at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266/interrupts.h line 25
0x402199d1: __loop_end() at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_main.cpp line 184
0x40219a07: loop_wrapper() at C:\Users\DanHuang\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_main.cpp line 198