Latest Cygwin update and Emacs in Mintty

[Ken Brown]

On 6/17/2017 4:20 AM, Achim Gratz wrote:
> Ken Brown writes:
>>> No, it really was a Cygwin update (to 2.7.0-1).  The Emacs update was
>>> before that and it had worked right up to that update.
>>
>> Sorry, I misunderstood what you meant by "Cygwin update".  I
>> understand now.  I'll try to do a bisection of the Cygwin sources.  It
>> may be a few days before I get to this.
> 
> It may be possible that the coreutils update messed up things in a way
> that I don't understand, but that's unlikely.  Or vim might have
> delivered a file that conflicts with something from Emacs, but Emacs has
> since been updated again and so that conflict would have flipped in
> favor of Emacs at those times, which I didn't observe (and no such
> conflicts seem to exist in the package file listings at the current
> moment).

I just tried downgrading cygwin1.dll to the 2016-12-14 snapshot, emacs 
to 25.1-1 (released 2016-09-17), and coreutils to 8.26-1 (released 
2016-12-16).  The problem is still there with that configuration.  And 
starting with an off-white background is not necessary.  Even with no 
.minttrc, 'emacs-nox -Q' followed by 'M-x set-background-color RET white 
RET' turns the background gray.  I can also reproduce the problem in 
xterm, so I don't think Mintty is the culprit.

What about ncurses?  That was updated on 2017-01-27?  I haven't tried 
downgrading it yet, but I can probably try it later today.

Ken

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