~/bibisect-win32-6.1
$ git bisect bad
d7bcc7f5e4508dded81629cfebfb6efe872794aa is the first bad commit
commit d7bcc7f5e4508dded81629cfebfb6efe872794aa
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Tue Apr 10 12:55:08 2018 -0700

    source sha:ea3d755ac949c1b6dada5c341e018f8c23f5d395

    source sha:ea3d755ac949c1b6dada5c341e018f8c23f5d395

:040000 040000 b2431a5e58b0ce17ad55dd65787feef6f90178dc afcbbcc085871d2e3e5c07c36fca73dc2b510c41 M      instdir

 ~/bibisect-win32-6.1
$ git bisect log
# bad: [cef8d89a77c3ca1d87bb52ae1d898271bd2689d1] source sha:da49f4aeb8d5e9a7d2cba8855d911e7cc1d2f1e2
# good: [29d08f54c2f71ffee4fe12dbb24c5f5cbedecfd2] source sha:6eeac3539ea4cac32d126c5e24141f262eb5a4d9
git bisect start 'origin/master' 'oldest'
# good: [f7a09816fd0c3b0433d1315de59cc22373e1627e] source sha:965527d76bc233b65795a5203029a65e28773e3b
git bisect good f7a09816fd0c3b0433d1315de59cc22373e1627e
# good: [31ca4c9973bd7a4084c31506f82c223902610f96] source sha:fe28b80dfc315dfa7f190b808f144cef6c664a29
git bisect good 31ca4c9973bd7a4084c31506f82c223902610f96
# bad: [025a070fab25c8f3185862fe45ab67595eff9d9f] source sha:a82cd19a5354a55afafe23ebe36390b3bbc87851
git bisect bad 025a070fab25c8f3185862fe45ab67595eff9d9f
# bad: [3d577df941c1448d5c797b0f940a0b65b12888a7] source sha:a6045159237419ce8fa49202c672e3895f0ab30a
git bisect bad 3d577df941c1448d5c797b0f940a0b65b12888a7
# bad: [a207d9ad0524f44c22a83c6749b7298d4209d446] source sha:4bba4b193feca178c8ec67bab5d7beee2cbe91c1
git bisect bad a207d9ad0524f44c22a83c6749b7298d4209d446
# good: [9caacf24f6d93e943efb5c85874a86fd537efce5] source sha:d2c8766a5e827e53f8f34893ff3d82a0df252f30
git bisect good 9caacf24f6d93e943efb5c85874a86fd537efce5
# good: [b059aa1216271098bc96d0438d4cf2b839894ec5] source sha:f9d747aa4ca27bcd16d8832a6bc1407f79cead0b
git bisect good b059aa1216271098bc96d0438d4cf2b839894ec5
# bad: [d25e8ad31b973b574f273e2c4a6a6dd1491ed23d] source sha:3edfbb0885f8f9b18074d42e16539436077631ef
git bisect bad d25e8ad31b973b574f273e2c4a6a6dd1491ed23d
# good: [f0fc521c5c2fdd4dd4c5df5c2b2ecb541882efc1] source sha:ad9c96b0251d17e7ae5a2ce8179ba0b0c805273e
git bisect good f0fc521c5c2fdd4dd4c5df5c2b2ecb541882efc1
# bad: [bf030a10cd96451dfc3c2927700c7fef681fd8e1] source sha:a50897107bca839af5665ee0f9621e9cce54900b
git bisect bad bf030a10cd96451dfc3c2927700c7fef681fd8e1
# good: [5b2202a0c1ab711ae0cc30ef97e1b45cf04e2823] source sha:94185507ed11bf6e2e2e9fa47c247680ae1edb36
git bisect good 5b2202a0c1ab711ae0cc30ef97e1b45cf04e2823
# bad: [31c85edb3ec615174c97fb0dffc009dc6e7f5904] source sha:e4eb416c3ef81d098ed61caabd2077cbbb2418bc
git bisect bad 31c85edb3ec615174c97fb0dffc009dc6e7f5904
# bad: [d7bcc7f5e4508dded81629cfebfb6efe872794aa] source sha:ea3d755ac949c1b6dada5c341e018f8c23f5d395
git bisect bad d7bcc7f5e4508dded81629cfebfb6efe872794aa
# first bad commit: [d7bcc7f5e4508dded81629cfebfb6efe872794aa] source sha:ea3d755ac949c1b6dada5c341e018f8c23f5d395