confusing stack traces

[timredfern]

Hi,

I'm seeing some inexplicable crashes in my esp-idf application. The stack traces look like this:

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Guru Meditation Error: Core 0 panic'ed ()
Core0 register dump:
PC      0846  PS      0604  A0      0d32  A1      fb10  : 0x0000: 0f1d: 000f: 0000
Afb44  0008  082e  fb10  : 0000: 0007: 0000: 0f1f
A0007  0000  0008  0005  : 0000: 00c8: 00c9: 0000
0846:0fed 0x06cfb20
1 r0652  06b4  0832  fbc0  : 0000: 0000: 0000: 0fc

EspStackTraceDecoder.jar says:

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Exception Cause: Not found

No Addresse found in Stracktrace!

There's also this:

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oe1 eitrdm: oe pnce Itrutwttmoto P1
2    x3fb3c A   :00001 4    x0000 A   :00001 
1    x0000 A1  :00011 1    x0000 A3  :0fa8 b 
XVDR x0000 LE  :000c2 ED   x409 LON :00000 
EC  :006b5 P2   x0000 P3   x0000 EC  :04157f
C    x407 P   :00604 0    x80a A   :0ff0 x41f:x0000
6    x3fb0c A   :00001 8    x0000 A   :005  
1    x0000 A5  :00000 A    x0001 ECAS:00006 0 
ECAD:00000 BG   x404 LN  :000c3 CUT  xffff 
Rboig.00c210ff0 x40a:x3fc11 x405:x3fc13 x400e:x0000

Martian?

I kind of suspect that the antenna is picking up stray EMFs from an electric motor and this causes the crash. Any ideas?

[timredfern]

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oe0 eitrdm: oe pnce Itrutwttmoto P0
2    x3fba A   :004 4    x0001 A   :0f5d0 fb0 
1    x000 A1  :00603 1    x803 A3  :0f5a0  
XVDR x0000 LE  :000c2 ED   x409 LON :00000  

C    x407 P   :00604 0    x80a A   :0f0 400e:x0000
6    x3fb0c A   :00001 8    x0000 A   :005 0b 
1    x0000 A5  :00001 A    x0001f ECAS:00005  
Bctae x407:x3fc2b008bd50f0008d280f0008d200861

and

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oe0 eitrdm: oe pnce Itrutwttmoto P0
2    x3fb7 A   :0fc0 4    x0006 A   :000d7 c7 
1    x0000 A1  :0fc0 1    x3fc27 A3  :00000 
XVDR x0000 LE  :000c2 ED   x40 LON :0ffff 0 

akrc:008460f0 x412b:x3fc2c003c000fc0

oe1 eitrdm:
2    x3fc0c A   :004 4    x0001 A   :0fd0 fc1 
1    x000 A1  :004 1    x80 A3  :0fa0 f3a6 
XVDR x0000 LE  :000c2 ED   x40 LON :0ffff  

This looks to me like the console is printing every other character: `akrc:` or `Bctae` for `Backtrace:`

nb I'm using the Esp-prog debugger device with a custom board that has a very simple design based on the reference. The console UART is connected by a 10cm ribbon cable.