Invoking SD_MMC.end method creates a crash

[pberna67]

Dear Developer

If the method SD_MMC.end is invoked, using ESP 2.0.0 than the system crash. There is no crash with previous ESP versions. This bug can be easily verified just using the SDMMC_Test and adding the SD_MMC.end method at the end of the example. Compile and run, then the system crashed

Describe your system( Hardware, computer, O/S, core version, environment).
Board: u.blox NINA B102 board with ESP32
Core Installation/update date: ESP 32 lib available in this site today
IDE name: Arduino IDE
Flash Frequency: https://www.u-blox.com/en/product/evk-nina-w10
PSRAM enabled: unnknown
Upload Speed: 115200
Computer OS: Windows 10

Additional not standard Libraries installed:
SD v1.2.4
Wifi v.2.4
Dellas T%emperature v2.9.0
DS18B29 v1.0.0
ESP32TimerInterrupt v1.4.0
ESOMQTTClient v1.11.1
OneWire v2.3.5
PubSubLinbet v2.8.9
RTCLib v1.14.1
uRTCLib v6.4.0

Modified (just with the SD_MMC.end() method added) sketch
SDMMC_Test_github.zip

Serial windows view

ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x3f (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1100
ho 0 tail 12 room 4
load:0x40078000,len:12280
ho 0 tail 12 room 4
load:0x40080400,len:3076
entry 0x400805ec
SD_MMC Card Type: SDSC
SD_MMC Card Size: 1886MB
Listing directory: /
DIR : System Volume Information
FILE: test.txt SIZE: 1048576
FILE: foo.txt SIZE: 13
FILE: log_ori.txt SIZE: 3294504
FILE: log_ori_2.txt SIZE: 16319302
FILE: log_at-16-06-21.txt SIZE: 23181588
Creating Dir: /mydir
Dir created
Listing directory: /
DIR : System Volume Information
FILE: test.txt SIZE: 1048576
FILE: foo.txt SIZE: 13
DIR : mydir
FILE: log_ori.txt SIZE: 3294504
FILE: log_ori_2.txt SIZE: 16319302
FILE: log_at-16-06-21.txt SIZE: 23181588
Removing Dir: /mydir
Dir removed
Listing directory: /
DIR : System Volume Information
Listing directory: /System Volume Information
FILE: WPSettings.dat SIZE: 12
FILE: IndexerVolumeGuid SIZE: 76
FILE: test.txt SIZE: 1048576
FILE: foo.txt SIZE: 13
FILE: log_ori.txt SIZE: 3294504
FILE: log_ori_2.txt SIZE: 16319302
FILE: log_at-16-06-21.txt SIZE: 23181588
Writing file: /hello.txt
File written
Appending to file: /hello.txt
Message appended
Reading file: /hello.txt
Read from file: Hello World!
Deleting file: /foo.txt
File deleted
Renaming file /hello.txt to /foo.txt
File renamed
Reading file: /foo.txt
Read from file: Hello World!
1048576 bytes read for 1360 ms
1048576 bytes written for 3912 ms
Total space: 1877MB
Used space: 41MB

// Here the SD_MMC.end() method is invoked

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

Core 1 register dump:
PC : 0x400d601c PS : 0x00060530 A0 : 0x800d462c A1 : 0x3ffb26f0
A2 : 0xc6a11032 A3 : 0x00000000 A4 : 0x00000009 A5 : 0x3ffb278f
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x80083b20 A9 : 0x3ffb2700
A10 : 0x3ffb8000 A11 : 0x3ffb93cc A12 : 0x00000004 A13 : 0xb33fffff
A14 : 0x00000001 A15 : 0x00000001 SAR : 0x00000018 EXCCAUSE: 0x0000001c
EXCVADDR: 0xc6a11036 LBEG : 0x400df848 LEND : 0x400df852 LCOUNT : 0x00000000

Backtrace:0x400d6019:0x3ffb26f00x400d4629:0x3ffb2720 0x400d4792:0x3ffb2760 0x400e718f:0x3ffb2780 0x400e7301:0x3ffb27b0 0x400d31b1:0x3ffb27d0 0x400d2443:0x3ffb27f0 0x400d3e1b:0x3ffb2820

ELF file SHA256: 0000000000000000

Rebooting...
ets Jul 29 2019 12:21:46

[chegewara]

https://github.com/espressif/arduino-esp32#decoding-exceptions
https://github.com/me-no-dev/EspExceptionDecoder

[me-no-dev]

@P-R-O-C-H-Y have a look please.

[P-R-O-C-H-Y]

@me-no-dev
Already fixed need to be merged. PR -> Fix: SD_MMC deinit #5732

[me-no-dev]

done :)

[pberna67]

can I download the update from this link ?
https://github.com/espressif/arduino-esp32/archive/refs/heads/master.zip

[P-R-O-C-H-Y]

Yes, Its merged into the master branch.