1.20.2.r4 GPy Core Panic Uploading FTP

[EL45]

I'm running v1.20.2.r4 and am consistently getting a Guru meditation error while trying to upload a file over FTP.

Does anyone have any insight, or anything I should try? I have tried performing a full erase and reprogramming, but get the same results.

>>> import network
>>> wlan = network.WLAN(mode=network.WLAN.STA)
>>> wlan.connect('MyNetwork', auth=(network.WLAN.WPA2, 'MyNetworkPassword'))
>>> wlan.ifconfig()
('192.168.1.39', '255.255.255.0', '192.168.1.1', '192.168.1.1')
###Begin Uploading a file.
>>> Guru Meditation Error: Core  0 panic'ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x4017e1eb  PS      : 0x00060a30  A0      : 0x8018269c  A1      : 0x3ffbaee0
A2      : 0x3fbc11d4  A3      : 0x3ffdfc7c  A4      : 0x00000011  A5      : 0x000005c4
A6      : 0x3fbc1802  A7      : 0x00000014  A8      : 0x8017e1c9  A9      : 0x3ffbaec0
A10     : 0x000005c4  A11     : 0x000105c4  A12     : 0x00000000  A13     : 0x00000000
A14     : 0x3ffb9f44  A15     : 0x00000001  SAR     : 0x00000010  EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000022  LBEG    : 0x40092860  LEND    : 0x4009288e  LCOUNT  : 0xffffffff

ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000

Backtrace: 0x4017e1eb:0x3ffbaee0 0x40182699:0x3ffbaf10 0x40172be5:0x3ffbaf30

Here is what I get when I run the backtrace lines through xtensa-esp32-elf-addr2line:

ip4_input
/home/peter/docs/pycom-esp-idf/components/lwip/lwip/src/core/ipv4/ip4.c:522 (discriminator 1)

[Gijs]

Could you let me know of the filesize?

The piece of code returned by the backtrace is part of the ESP-IDF, something we have no control over unfortunately, though if you can try the beta release (1.20.3.b3) which is built upon a new ESP-IDF version and see if the issue persists?

Let me know!

[EL45]

The file size I've been using to reproduce this reliably (on this GPy) is 1,904KB. I have 50 other GPy not having this problem.

I updated to 1.20.3.r3 and gave it a shot again. I got this core dump:

>>> Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unh                                                                                           andled.
Core 0 register dump:
PC      : 0x4014f8da  PS      : 0x00060c30  A0      : 0x80154615  A1      : 0x3f                                                                                           fdf5f0
A2      : 0x3fbc9838  A3      : 0x3ffb5278  A4      : 0x1f8042a4  A5      : 0x3f                                                                                           bcab7a
A6      : 0x2501a8c0  A7      : 0x00000014  A8      : 0x00000000  A9      : 0x3f                                                                                           fdf5d0
A10     : 0x000005c4  A11     : 0x00000000  A12     : 0x3ffdf6d8  A13     : 0x00                                                                                           000001
A14     : 0x000000fe  A15     : 0x00000001  SAR     : 0x00000010  EXCCAUSE: 0x00                                                                                           00001d
EXCVADDR: 0x1f8042d0  LBEG    : 0x4008f22c  LEND    : 0x4008f248  LCOUNT  : 0xff                                                                                           ffffff

ELF file SHA256: 0000000000000000

Backtrace: 0x4014f8d7:0x3ffdf5f0 0x40154612:0x3ffdf620 0x40141ae1:0x3ffdf640

md4_finish
/home/gezahusi/Work/Repositories/pycom-esp-idf/components/lwip/lwip/src/netif/ppp/polarssl/md4.c:264 (discriminator 4)

[Gijs]

Perhaps the flash on your device is already full (1.9MB is quite a large file, two of those will probably not fit). Note that we also place the firmware in the 4MB flash. I think the issue is with flash space running out for this GPy. You could try to do an erase-all in the CLI updater, or os.fsformat("/flash") to empty the flash.