Eli Zaretskii wrote:

> I needed this commit to prevent temacs from crashing during dumping.
> Don't ask me how including errno.h (both the one from Gnulib and the
> MinGW one) could cause this, especially as the preprocessed __fpending
> doesn't seem to change a bit as result of that, and it doesn't seem to
> even be called during dumping.  The facts are stubborn: if I leave
> that inclusion in place, I get a crash, removing it fixes the crash.

I propagated this fix back to gnulib by installing the attached patch to Gnulib. 
I'll CC: this to Bruno Haible, who made the recent change to fpending. I don't 
use MinGW myself.