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Subject:	Re: [ANNOUNCEMENT] Updated: mintty 2.7.4
To:	cygwin AT cygwin DOT com
References:	<announce DOT 245a59b4-c8dd-31c0-8f79-3b1c8e28a139 AT towo DOT net> <87vasqrl2a DOT fsf AT Rainer DOT invalid> <c377cada-562c-9a5d-14c3-b1f0b204abd5 AT towo DOT net> <25e79ef3-c0ca-2d9f-7353-413580222412 AT SystematicSw DOT ab DOT ca> <52fb66c3-5dc5-afd7-02bf-acdb0a2a9972 AT towo DOT net> <bba687bb-b724-a7d2-2608-3bdc3af772ff AT SystematicSw DOT ab DOT ca> <9c13d3fc-9dbd-f89f-05da-28525e0e16e0 AT towo DOT net> <87r3383515 DOT fsf AT Rainer DOT invalid> <3e775b3d-2a2a-4cd8-4168-4cc4d502da06 AT towo DOT net>
From:	Thomas Wolff <towo AT towo DOT net>
Message-ID:	<d02c301d-b8b4-3c63-00a1-e1c1f886a368@towo.net>
Date:	Thu, 9 Feb 2017 20:37:15 +0100
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Am 08.02.2017 um 23:51 schrieb Thomas Wolff:
> Am 08.02.2017 um 19:34 schrieb Achim Gratz:
>> Thomas Wolff writes:
>>> Further comments welcome, and it's Achim's turn to provide further
>>> diagnostics input as requested in another mail. It could also be that
>>> screen or tmux simply make invalid assumptions about the setting of
>>> Wraparound modes.
>> That will take a while.  I'll have to set up something at home
>> specifically with the goal of reproducing the error.  At the moment it
>> looks like some sort of race between decisions made at different levels
>> of the stack mintty / tmux / mosh / screen since so far I've not been
>> able to reproduce if I take out one of these.
I’ve installed mosh to see what it actually is.
The man page speaks about speculative local echo which sounds like 
asking for trouble...

Anyway, I could reproduce effects as you described with
mintty – tmux – mosh localhost (no additional screen needed)
And, most interesting for me: the same thing happens in xterm, so it’s 
not a mintty issue :)

> Actually I have found a bug in the combination of auto wraparound mode 
> with scrolling region margins and origin mode.
> Once fixed, that could even affect the issue, we'll see.
The supposed bug mentioned before wasn’t related to scrolling regions.
Instead, I’ve tried to mimick xterm in some obscure border cases, and 
now the vttest case 1 page 3 passes as well.

------
Thomas

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