Re: Unexec dumping results in "Segmentation fault" on Windows Msys2

[Nikolay Kudryavtsev]

I now know what's going on there.

buffer.c/init_buffer has some unexec-specific code that remaps memory 
for the special buffers inherited from temacs. We fail at 
Fprin1_to_string which uses the " prin1" special buffer. cddf85d256 
removed FOR_EACH_BUFFER macro and replaced it everywhere with the use of 
FOR_EACH_LIVE_BUFFER. Because FOR_EACH_LIVE_BUFFER does not iterate over 
the " prin1" buffer, it does not get its memory remapped and this breaks 
print functionality and elisp compilation, which depends on it.

FOR_EACH_BUFFER worked before due to buffer structure operating as a 
linked list and since it's kind of an ugly way of doing things, make 
sense why Stefan removed it. But I'm not if adding those special buffers 
to Vbuffer_alist(FOR_EACH_LIVE_BUFFER uses it) would not break anything.