> Do you think it's reproducible on a dummy jtag driver? If yes, I can
> give it a try later on today.

I don't think I can reproduce without the interface and target. I
tried just with the dummy driver, but I don't think I reach the faulty
part of the code.

./configure --enable-maintainer-mode --enable-dummy
make
openocd -f ./tcl/interface/dummy.cfg -f ./tcl/target/stm32.cfg

Of course, openocd cannot connect to the target, "reset halt" fails
with a nice error message, and no crash.

> reset halt
JTAG scan chain interrogation failed: all ones
Check JTAG interface, timings, target power, etc.
Trying to use configured scan chain anyway...
stm32.cpu: IR capture error; saw 0x0f not 0x01
Bypassing JTAG setup events due to errors
Invalid ACK 0x7 in JTAG-DP transaction
examine-fails: -107

Command handler execution failed
in procedure 'reset'
Polling target failed, GDB will be halted. Polling again in 6300ms
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