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Date: Sat, 1 Sep 2018 17:54:35 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Bug Report: Regression in Cygwin 2.11.0-1
Message-ID: <20180901155435.GL6350@calimero.vinschen.de>
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References: <BL2PR16MB096125DC7F302700C5DE88C0C80E0@BL2PR16MB0961.namprd16.prod.outlook.com> <pmdgjr$9q9$1@blaine.gmane.org>
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On Sep  1 09:56, Andreas Hauptmann wrote:
> On Sat, 1 Sep 2018 01:24:49 +0000
> Bryan Phelps wrote:
>=20
> > I'll continue to look around for a more minimal repro,
>=20
> The normalization of paths with backslashes has changed.
>=20
> The following doesn't work any longer:
>=20
>     cd /tmp
>     stat "..\bin\file.exe" # or
>     stat "..\\bin\\file.exe"
>=20
> This however still works:
>=20=20=20=20=20
>     stat "C:\cygwin\bin\file.exe"

I know where the problem is.  A new piece of code fixing a crash due to
a buffer underflow is too aggressively guarding the path buffer against
this underflow when normalizing ".." in Win32 paths.

I'll fix this and release a 2.11.1 soon, but I still have a question:

Why do I push out test releases if nobody cares?

In terms of this OCAML build system problem:

Please fix your build system.  Do not mix POSIX and Win32 paths, use
POSIX paths only.  Backslashes are *no* drop-in replacement for slashes.
Some of the path handling is seriously crippled as soon as you start
using backslashes, and that's a delipberate decision and won't change,
even after fixing the aforementioned bug.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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