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Date:	Wed, 16 Apr 2014 19:04:14 -0600
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To:	Cygwin-L <cygwin AT cygwin DOT com>
Subject:	Re: Wow, just hit RCS bug (attn: Dr Volker Zell)
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On 4/16/2014 10:09, tednolan AT bellsouth DOT net wrote:
> I just hit the worst Cygwin bug I've encountered, the RCS bug which
> silently corrupts text files > 256K.

It's not a bug, it's a buffer size choice made with the rcs 5.8 release, 
which affects Cygwin for reasons unknown.

GNU rcs 5.9.2 changed this functionality again in a way which may fix 
the problem:

2013-10-20  Thien-Thi Nguyen  <XXX AT XXX DOT org>

     Relax RCS_MEM_LIMIT default; fall back if unspecified.

     * doc/rcs.texi (Environment): Update ‘RCS_MEM_LIMIT’ description;
     add a willful ignorance hint and speculation on its removal.

I built 5.9.2 under Cygwin with default build options, and it 
successfully runs a test script that fails under the current Cygwin rcs, 
which was posted by Don Hatch when this problem came up here 6 months 
ago: http://cygwin.com/ml/cygwin/2013-10/msg00086.html

Dr Volker Zell, the maintainer of the Cygwin rcs package, did not 
respond to that thread.  A search shows only two emails from him to this 
list since that time.

As far as I know, no one has investigated the reason why this change 
causes a problem on Cygwin, but it would seem that replacing 5.8.2 with 
5.9.2 would help.

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