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From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <141120091803.ZM3693@torch.brasslantern.com>
Date: Thu, 20 Nov 2014 09:18:03 -0800
In-reply-to: <5A1A98B7-42E0-4EE1-9468-32E2D6434246@kba.biglobe.ne.jp>
Comments: In reply to "Jun T." <takimoto-j@kba.biglobe.ne.jp>
 "Re: Confirming X02zlevi test failures" (Nov 21, 12:42am)
References: <141119085006.ZM18951@torch.brasslantern.com>
	<11014.1416438322@quattro>	<141119222019.ZM2717@torch.brasslantern.com>
	<5A1A98B7-42E0-4EE1-9468-32E2D6434246@kba.biglobe.ne.jp>
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To: zsh-workers@zsh.org
Subject: Re: Confirming X02zlevi test failures
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On Nov 21, 12:42am, Jun T. wrote:
}
} Next I replaced TCSADRAIN by TCSANOW in settyinfo() (utils.c, line 1554),
} and now 'swap case on a blank line' in X02zlevi.ztst seems to succeed.
} But I don't know what kind of unwanted side effects it may cause.

It'll cause typeahead to be misinterpreted when using a "real" terminal
device, I fear.  It took a lot of work back in the day to get that tty
draining stuff right.
 
} Moreover, if 'werase undef' is removed from comptest, line 37, then
} X02zlevi.ztst fails again at
} 'line based put before followed by character based yank-pop'.

I begin to suspect that what needs to happen is that zpty needs to be a
lot more aggressive internally about consuming (and buffering up) the
slave output as fast as it appears, even if a zpty read call has not
yet been made from the shell.  Clearly the slave can "see" it's own
output if the master doesn't manage to grab it first.