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bisect: explain the rationale behind 125

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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Junio C Hamano 2011-03-19 21:46:06 -07:00
parent b547ce0b18
commit 958bf6b768
1 changed files with 6 additions and 1 deletions
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7
Documentation/git-bisect.txt
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@ -241,7 +241,12 @@ exit(3) manual page), as the value is chopped with "& 0377".
The special exit code 125 should be used when the current source code
cannot be tested. If the script exits with this code, the current
revision will be skipped (see `git bisect skip` above).
revision will be skipped (see `git bisect skip` above). 125 was chosen
as the highest sensible value to use for this purpose, because 126 and 127
are used by POSIX shells to signal specific error status (127 is for
command not found, 126 is for command found but not executable---these
details do not matter, as they are normal errors in the script, as far as
"bisect run" is concerned).
You may often find that during a bisect session you want to have
temporary modifications (e.g. s/#define DEBUG 0/#define DEBUG 1/ in a