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Re: Wow, just hit RCS bug (attn: Dr Volker Zell)

On 4/16/2014 10:09, 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  <>

    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:

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.

Problem reports:
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