bug#36431: Crash in marker.c:337

[Stefan Monnier]

>> Alright, so here one way to make this "transient" inconsistent state
>> escape its transientness (should it be "transienticity"?) and crash Emacs:
>> 
>>     (catch 'toto
>>       (let ((set-auto-coding-function (lambda (rest _) (throw 'toto nil))))
>>         (erase-buffer)
>>         (insert-file-contents "~/tmp/foo-c3c3.txt")))
>>         
>> where `~/tmp/foo-c3c3.txt` is a file that contains some invalid
>> utf-8 byte sequence (in my case I used two bytes C3 together).
> You are saying that decide_coding_unwind should do a better job?

Not sure yet.  In any case, it's a rather contrived situation.


        Stefan