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From:	Bruno Haible <bruno AT clisp DOT org>
To:	cygwin AT cygwin DOT com
Cc:	Assaf Gordon <assafgordon AT gmail DOT com>
Subject:	iswcntrl() regression
Date:	Wed, 19 Dec 2018 13:53:06 +0100
Message-ID:	<24530320.43gEWRNkUz@omega>
User-Agent:	KMail/5.1.3 (Linux/4.4.0-139-generic; KDE/5.18.0; x86_64; ; )
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Hi,

POSIX [1] requires that iswcntrl (EOF) == 0.

This was true in         CYGWIN_NT-10.0 2.9.0(0.318/5/3) (x86_64)
but is no longer true in CYGWIN_NT-10.0 2.11.1(0.329/5/3) (x86_64).
(Reported by Assaf Gordon.)

Looking at the changes that occurred in the cygwin git between
2.9.0 (on 2017-08-03) and 2.11.1 (on 2018-08-31)
it appears to me that the culprit is the commit
41f72ab4d7c404b8ac2a5e1187d79164992e4483 (on 2018-03-09).

I would like to CC its author, Thomas Wolff, but he gave an invalid
email address <mintty AT users DOT noreply DOT github DOT com> in the commit.

This regression was found by gnulib's test suite
https://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=blob;f=tests/test-wctype-h.c

Bruno


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