~/bibisect-win32-6.1
$ git bisect bad
4a73f868e7d2f62b1ccd480731896a36a1f94035 is the first bad commit
commit 4a73f868e7d2f62b1ccd480731896a36a1f94035
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Tue Mar 6 20:20:50 2018 -0800

    source sha:27008aa028cde8d270e898c5743a9fe5c7701dab

    source sha:27008aa028cde8d270e898c5743a9fe5c7701dab

:040000 040000 a08213efe280d89997dfc075760bef110b900cd7 8369380d2ac92b3e2e8f0f717f76d4db7a166f77 M      instdir

~/bibisect-win32-6.1
$ git bisect log
# bad: [7ee9f0665bc96bcfa34506bef9b1569e6b368708] source sha:22c451df33b733440f24c1feb6380d31240d55e6
# good: [29d08f54c2f71ffee4fe12dbb24c5f5cbedecfd2] source sha:6eeac3539ea4cac32d126c5e24141f262eb5a4d9
git bisect start 'origin/master' 'oldest'
# good: [c0dc3e12b2b5f3047c02ed9cfe2f54e3fd663273] source sha:fa2a43c29051b1bdcd0aef2e9cebfd206a4448ce
git bisect good c0dc3e12b2b5f3047c02ed9cfe2f54e3fd663273
# bad: [aa9ee79da17464e0558d7b73ef63e1e14c5ba342] source sha:cc7ff0c141e27090ab521073b961b5eeeb4d693e
git bisect bad aa9ee79da17464e0558d7b73ef63e1e14c5ba342
# bad: [282e4b2e052782ba1439586db1cfca473e9b9c2a] source sha:dfe797e8a54f49270f25043dda5fdd95d8fbc4ff
git bisect bad 282e4b2e052782ba1439586db1cfca473e9b9c2a
# bad: [863e1aa59aba55cef24d47e6bc98a23707a4019a] source sha:1615d0eb285eeaf3da10b4ed727b776b0a28b94d
git bisect bad 863e1aa59aba55cef24d47e6bc98a23707a4019a
# good: [4427ac806e4491a6340302fe60db6723333a5514] source sha:d24dba40175256a317a3d2281c70d3240b74f4a0
git bisect good 4427ac806e4491a6340302fe60db6723333a5514
# good: [2685cce9c51236a4688eba994b4c09bb0b434bee] source sha:6eab752bdf7c8f9c743d20fed29fd60cb4e241f6
git bisect good 2685cce9c51236a4688eba994b4c09bb0b434bee
# good: [b85c40f7f2223be2f81f8e83f7433772f16ca09a] source sha:80c98c069b37bd2f8f67d2f6b59edc3b4c6abea5
git bisect good b85c40f7f2223be2f81f8e83f7433772f16ca09a
# good: [4c2738d984d85b700797b47a5c04382da512f358] source sha:6e32cf8b654abc103f3f742b7b7ae0fff0e64f69
git bisect good 4c2738d984d85b700797b47a5c04382da512f358
# bad: [b83b78826219814e931dae1551cd42977f1a1680] source sha:2407c183092d6559771738891d57d6375c4212ab
git bisect bad b83b78826219814e931dae1551cd42977f1a1680
# good: [511fb2225b3915f734eae2d507b278a76adbaa60] source sha:5a4d6162f643050faf00ccf08d58feed00dcd781
git bisect good 511fb2225b3915f734eae2d507b278a76adbaa60
# bad: [0e48a304d655cc474ade3d2b04e78323b798d043] source sha:e030fbbf67a2490c4e734583d9f987c27506179e
git bisect bad 0e48a304d655cc474ade3d2b04e78323b798d043
# bad: [9ed43f3a20bd15139a610cbdaf2c4d98dc9dc96c] source sha:f7d3fc13333774f3ada2af1c752bc8a63055a2ff
git bisect bad 9ed43f3a20bd15139a610cbdaf2c4d98dc9dc96c
# bad: [4a73f868e7d2f62b1ccd480731896a36a1f94035] source sha:27008aa028cde8d270e898c5743a9fe5c7701dab
git bisect bad 4a73f868e7d2f62b1ccd480731896a36a1f94035
# first bad commit: [4a73f868e7d2f62b1ccd480731896a36a1f94035] source sha:27008aa028cde8d270e898c5743a9fe5c7701dab