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Date: Sat, 01 Feb 2014 10:01:18 +0100
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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Subject: Re: Scrollback buffer broken with snapshot
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On 31/01/2014 03:57, Steven Penny wrote:
> On Thu, Jan 30, 2014 at 8:44 PM, Steven Penny wrote
>> However using this snapshot
>> http://cygwin.com/snapshots/x86_64/cygwin1-20140128.dll.xz
>>
>> it now only clears the screen
>
> More info
>
>      cygwin1-20140128.dll.xz  BAD
>      cygwin1-20140124.dll.xz  BAD
>      cygwin1-20140118.dll.xz  BAD
>      cygwin1-20140117.dll.xz  BAD
>      cygwin1-20140108.dll.xz  BAD
>      cygwin1-20140105.dll.xz  BAD
>      cygwin1-20131231.dll.xz  GOOD
>
> --

looking at the timing, it is possible that the regression
is coming from this change

http://cygwin.com/ml/cygwin-cvs/2014-q1/msg00000.html

I am not an expert in this area but on

https://sourceware.org/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_console.cc.diff?cvsroot=src&r1=1.283&r2=1.284

Is see that a specific workaround was disabled
--------------------------------------------------------------
+#if 0 /* CGF: 2014-01-04 Assuming that we don't need this anymore */
    /* ScrollConsoleScreenBuffer on Windows 95 is buggy - when scroll 
distance
     * is more than half of screen, filling doesn't work as expected */
--------------------------------------------------------------

re-enabling it and testing should be easy, could you make by yourself ?

Marco

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