> On Oct 9, 2016, at 20:22, Jeremy Huddleston Sequoia 
> <jerem...@freedesktop.org> wrote:
> 
> The issue is that the whitespace before the filename in $(git ls-files -s 
> "$2") is a tab, and test_mode_in_index only looks for a space.

Actually, looks like that as just a rabbit hole.  The real issue looks to be 
because an earlier test drops down xfoo3 as a symlink, which causes this test 
to fail due to the collision.  I'll get out a patch in a bit.

> 
>> <
> 
>> On Oct 9, 2016, at 19:51, Jeremy Huddleston Sequoia 
>> <jerem...@freedesktop.org> wrote:
>> 
>> 
>>> On Oct 9, 2016, at 17:15, Jeremy Huddleston Sequoia 
>>> <jerem...@freedesktop.org> wrote:
>>> 
>>> Hi Thomas,
>>> 
>>> I wanted to let you know that this patch of yours, which landed in git 
>>> 2.10.1, introduced some test failures, seen on macOS.
>>> 
>>> Let me know if you need any additional information to track these down.
>>> 
>>> Thanks,
>>> Jeremy
>>> 
>>> not ok 40 - git add --chmod=[+-]x changes index with already added file
>>> #   
>>> #           echo foo >foo3 &&
>>> #           git add foo3 &&
>>> #           git add --chmod=+x foo3 &&
>>> #           test_mode_in_index 100755 foo3 &&
>>> #           echo foo >xfoo3 &&
>>> #           chmod 755 xfoo3 &&
>>> #           git add xfoo3 &&
>>> #           git add --chmod=-x xfoo3 &&
>>> #           test_mode_in_index 100644 xfoo3
>>> #   
>>> 
>>> commit 610d55af0f082f6b866dc858e144c03d8ed4424c
>>> Author: Thomas Gummerer <t.gumme...@gmail.com>
>>> Date:   Wed Sep 14 22:07:47 2016 +0100
>>> 
>>>  add: modify already added files when --chmod is given
>>> 
>>>  When the chmod option was added to git add, it was hooked up to the diff
>>>  machinery, meaning that it only works when the version in the index
>>>  differs from the version on disk.
>>> 
>>>  As the option was supposed to mirror the chmod option in update-index,
>>>  which always changes the mode in the index, regardless of the status of
>>>  the file, make sure the option behaves the same way in git add.
>>> 
>>>  Signed-off-by: Thomas Gummerer <t.gumme...@gmail.com>
>>>  Signed-off-by: Junio C Hamano <gits...@pobox.com>
>> 
>> 
>> This failure looks odd.  I'll dig into it a bit more as it looks like 
>> something odd is going on here...
>> 
>> expecting success: 
>>      echo foo >foo3 &&
>>      git add foo3 &&
>>      git add --chmod=+x foo3 &&
>>      test_mode_in_index 100755 foo3 &&
>>      echo foo >xfoo3 &&
>>      chmod 755 xfoo3 &&
>>      git add xfoo3 &&
>>      git add --chmod=-x xfoo3 &&
>>      test_mode_in_index 100644 xfoo3
>> 
>> pass
>> cannot chmod 'xfoo3'fail
>> 120000 c5c4ca97a3a080c32920941b665e94a997901491 0    xfoo3
>> not ok 40 - git add --chmod=[+-]x changes index with already added file
>> #    
>> #            echo foo >foo3 &&
>> #            git add foo3 &&
>> #            git add --chmod=+x foo3 &&
>> #            test_mode_in_index 100755 foo3 &&
>> #            echo foo >xfoo3 &&
>> #            chmod 755 xfoo3 &&
>> #            git add xfoo3 &&
>> #            git add --chmod=-x xfoo3 &&
>> #            test_mode_in_index 100644 xfoo3
>> #    
>> 
> 

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