From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue,  2 Oct 2012 16:45:00 -0600
Message-ID: <CAK4xykWkPuDxHLW1wFEC8mYKhaLTb8101Bx39g_02fSBi7GzPw@mail.gmail.com>
From: andrey mirtchovski <mirtchovski@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>,
	plan9port-dev@googlegroups.com
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Subject: [9fans] acme Edit bug
Topicbox-Message-UUID: bc52afe8-ead7-11e9-9d60-3106f5b1d025

Edit (or something in its chain) appears to be broken on buffer
boundary in p9p and in plan9. To test:

$ perl -e '{print "A"x1023;}' > t.txt # for plan9 acme replace 1023 with 81=
91
$ echo [any multibyte utf rune, for example =D0=A9] >> t.txt
$ acme t.txt
[ in acme, middle-swipe "Edit , |cat" without the quotes ]

this happens with any binary on the other side of the pipe (originally
discovered with gofmt). it happens on multiples of that size too,
1024, 2048, etc for p9p. it does not occur if just the pipe is used,
only when going through Edit.