Infinite crash/reboot loop

[StewieTee]

• decoded 1st stack dump, at end of this message. Several others stack-dumps also included as part of the crash/reboot loop

Basic Infos

Arduino 1.6.7 (windows and MAC)

Hardware

Hardware: multiple types as below
Core Version: tried feb-28th-stable and github version as of 19th March. Windows and Mac.

Description

Trying to use the provided example 'WIFITelnetToSerial' which causes an infinite crash/reboot loop.
I can compile/run other assorted software with no problem but when I try the above example I get the reboot-loop every time.
I have tried this on a:
NodeMCU 1.0 board (setting as per default arduino IDE)
ESP-01 (512KB) & 1MB version
ESP-07 (1MB)
WEMOS mini (setting as per arduino IDE)

Settings in IDE

All with 80Mhz cpu, 40Mhz flash, reset method nodeMCU, serial upload. Tried DIO and QIO.

After trying the failing software above, I can still compile and upload other software and it runs OK.
Tried complete flash-erase using esptool and then loading the failing software into the clean chip but no difference.
When the software is first uploaded and it starts up, after the first crash-fail it just sits and does nothing. Pressing reset then causes the infinite loop of reboot cycles.
exception type is:
exception 2 InstructionFetchErrorCause

There are other items/programs that cause the same effect, compiled size does not seem to be relevant.
Sometimes the boot process gets as far as trying to connect to the local wifi. Sometimes works, sometimes crashes mid way.

Sketch

supplied example 'WIFITelnetToSerial' in the distribution.

Debug Messages

This is the first load into a flash erased chip. After the first crash, the RST button was pressed and the reboot loop commences.

om 16
�
Exception (2):
epc1=0x3ffe84a7 epc2=0x00000000 epc3=0x00000000 excvaddr=0x3ffe84a4 depc=0x00000000

ctx: sys
sp: 3ffffca0 end: 3fffffb0 offset: 01a0

stack>>>
3ffffe40: 4010418a 0000002d 7fffffff 00000002
3ffffe50: 0000012d 00000030 0000001c ffffffff
3ffffe60: 401030ef 00080000 00000001 fffffffe
3ffffe70: 00000000 40206868 00002200 4000050c
3ffffe80: 3fffc278 40102dec 3fffc200 00000022
3ffffe90: 3ffffea0 00000004 3ffffef0 3fffff01
3ffffea0: 40107020 00000000 3ffeff60 00000000
3ffffeb0: 3ffe8004 00000000 000000a5 00000000
3ffffec0: feefeffe 00000000 00000000 3ffffe50
3ffffed0: 00000000 00000000 00000001 3ffeed00
3ffffee0: 3fffff00 3ffffef0 00000004 00000030
3ffffef0: 000000ff 3ffe85aa 3ffeff60 000000e5
3fffff00: 000000a5 00000005 00000081 00000001
3fffff10: 3fff01dc 40221c4a 3fff098c 4010031d
3fffff20: 3ffe8984 000001c0 3ffeeca0 40100426
3fffff30: 00000000 00000001 40206807 40100537
3fffff40: 3ffee3e0 00000000 3fff015c 401008c1
3fffff50: 40206870 3ffe8984 3fff0164 40107218
3fffff60: 3ffeeca0 0000008c 0000008c 40219060
3fffff70: 402070f4 ffffffff 00000000 00000001
3fffff80: 3ffec2c0 40206a6a 3fffdab0 00000000
3fffff90: 3fffdcc0 3ffe8bb8 00000000 4020379b
3fffffa0: 3ffe8bb8 40000f49 3fffdab0 40000f49
<<<stack<<<

ets Jan 8 2013,rst cause:2, boot mode:(1,6)

ets Jan 8 2013,rst cause:4, boot mode:(1,6)

wdt reset
rl

[igrr]

See #1695.