Hello.
I have an ESP32 that first ran well, I updated its configuration several times, and suddenly it began to crash with :
INFO Successfully uploaded program.
INFO Starting log output from /dev/ttyUSB0 with baud rate 115200
[17:23:58][I][logger:119]: Log initialized
[17:23:58][VV][preferences:036]: LOAD 0: valid=YES, 0=0x00000000 1=0x0DEFE4E3 (Type=233825507, CRC=0x0DEFE4E3)
[17:23:58][C][ota:484]: There have been 0 suspected unsuccessful boot attempts.
[17:23:58][VV][preferences:049]: SAVE 0: 0=0x00000001 1=0x42F4583F (Type=233825507, CRC=0x42F4583F)
[17:23:58][I][application:055]: Running through setup()...
[17:23:58][V][application:056]: Sorting components by setup priority...
[17:23:58][C][wifi:027]: Setting up WiFi...
[17:23:58][V][wifi_esp32:033]: Enabling STA.
[17:23:58]Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
[17:23:58]Core 1 register dump:
[17:23:58]PC : 0x400eafe3 PS : 0x00060230 A0 : 0x800f1c49 A1 : 0x3ffb17a0
INFO Need to fetch platformio IDE-data, please stand by
INFO Running: platformio run -d config/klsesp2 -t idedata
WARNING Decoded 0x400eafe3: _svfprintf_r at /Users/ivan/e/newlib_xtensa-2.2.0-bin/newlib_xtensa-2.2.0/xtensa-esp32-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/vfprintf.c:1604
[17:24:00]A2 : 0x00000400 A3 : 0x00000000 A4 : 0x3ffb1994 A5 : 0x00000052
[17:24:00]A6 : 0x3ffb1930 A7 : 0x00000001 A8 : 0x00000000 A9 : 0xffffffff
[17:24:00]A10 : 0x00000024 A11 : 0x0000002a A12 : 0xffffffff A13 : 0x3f409df8
[17:24:00]A14 : 0x3ffb17b0 A15 : 0xff000000 SAR : 0x00000016 EXCCAUSE: 0x0000001c
[17:24:00]EXCVADDR: 0x00000008 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
[17:24:00]
[17:24:00]Backtrace: 0x400eafe3:0x3ffb17a0 0x400f1c46:0x3ffb1ab0 0x400f1c7e:0x3ffb1b40 0x400d477e:0x3ffb1b80 0x400d4619:0x3ffb1ba0 0x4008450a:0x3ffb1be0 0x4013799f:0x3ffb1c30 0x40132787:0x3ffb1c70 0x4010fa20:0x3ffb1c90 0x4010fbf6:0x3ffb1cc0 0x400e3bf9:0x3ffb1cf0 0x4012f566:0x3ffb1d10 0x400d7a80:0x3ffb1e10 0x400d6d21:0x3ffb1e40 0x400d3862:0x3ffb1e80 0x400d33b5:0x3ffb1ea0 0x400d22a5:0x3ffb1ef0 0x400dc1b7:0x3ffb1fb0 0x40091245:0x3ffb1fd0
There is more information about this bug here :