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	Fri, 26 Nov 2021 15:43:57 -0800 (PST)
From:	Duncan Roe <duncan_roe AT optusnet DOT com DOT au>
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Date:	Sat, 27 Nov 2021 10:43:52 +1100
To:	Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
Subject:	Re: raise(-1) has stopped returning an error recently
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On Wed, Nov 24, 2021 at 10:25:46AM +0100, cygwin wrote: [...]
>
> What is that "permanent restriction" in Cygwin?  Is that something we
> could fix or something unfixable?  Did you try to debug Cygwin in terms
> of that problem?  If not, could you extract a reduced, very simple
> stand-alone testcase for further debugging?
>
The restriction is in grep/gnulib source. From
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27555#5

>> I've determined the cause, at least. The sole caller of mbstoupper
>> (which contained the relevant __CYGWIN__-specific
>> surrogate-pair-handling code) was removed by the improvements of
>> v2.21-63-g8a33cde, and not long after, I noticed that mbstoupper was
>> no longer used, so removed it altogether.

I submitted a patch to save anyone else wasting time over this. So please don't
you,

Cheers ... Duncan.

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