~/win64-7.1
$ git bisect good
6e77cf663217bb333eb0b818a2c9291cd37625bd is the first bad commit
commit 6e77cf663217bb333eb0b818a2c9291cd37625bd
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Mon Sep 7 07:23:30 2020 -0700

    source sha:717ce6838b7ef0add1f9a9655e2b8c0bf60203f0

    source sha:717ce6838b7ef0add1f9a9655e2b8c0bf60203f0

:040000 040000 6e6ba302539bac7a872df659a66d0dfd4c2810a4 bebdab311b23d17adf96467dafaa3e0f6bb1d5b8 M      instdir

 ~/win64-7.1
$ git bisect log
# bad: [f31662d06d0e6a1d3897e4cd523c42bde634152b] source sha:f9fab4203c1aa0b9a3f27ce2713b6d5addc7df19
# good: [5dda870d87685eced00ca4ba6d5ceb48aff3c19e] source sha:574c57090642347980d2395e1e183cc7b5c171ad
git bisect start 'origin/master' 'oldest'
# good: [e36a0382c971480e09a644fac47b484b6e3048ee] source sha:62ca189dbc9d21a11fd638245c3c2abd438d39ac
git bisect good e36a0382c971480e09a644fac47b484b6e3048ee
# good: [e36a0382c971480e09a644fac47b484b6e3048ee] source sha:62ca189dbc9d21a11fd638245c3c2abd438d39ac
git bisect good e36a0382c971480e09a644fac47b484b6e3048ee
# bad: [6de8f211e06e5f9f1670c2b576ca9a9ea36ee264] source sha:659c56b06a658950c82af9789376ff0c1858a787
git bisect bad 6de8f211e06e5f9f1670c2b576ca9a9ea36ee264
# bad: [9f8231a12776180411493431e03f852927ec78d0] source sha:5e8e7f09c50d972795fbca4ffa87b52e71b87ee9
git bisect bad 9f8231a12776180411493431e03f852927ec78d0
# bad: [9f8231a12776180411493431e03f852927ec78d0] source sha:5e8e7f09c50d972795fbca4ffa87b52e71b87ee9
git bisect bad 9f8231a12776180411493431e03f852927ec78d0
# bad: [ec0f6de2b3bfff31ecfa96760b3391ba2afbeec1] source sha:aa9a5e412490cd6b50f3861868a866d2d7fa5011
git bisect bad ec0f6de2b3bfff31ecfa96760b3391ba2afbeec1
# good: [54b964decfebcc3ed7fb50f04dba1ff80e6c5584] source sha:138f02ac273d8a7217c51c800f18836041229b99
git bisect good 54b964decfebcc3ed7fb50f04dba1ff80e6c5584
# bad: [6214b6fd5d598faa1ccab78d392813817d805e08] source sha:46964d7bd509b2c75a8a09078d41d71f6523788c
git bisect bad 6214b6fd5d598faa1ccab78d392813817d805e08
# bad: [50070e42a27a1872b6806d1d919d47e0c88f4250] source sha:a8a7df6de6b48a03589ac9b66b490875eab19b75
git bisect bad 50070e42a27a1872b6806d1d919d47e0c88f4250
# good: [faca64f1b59762341c14e6c9e9b1ab39545b2351] source sha:34f37ce6b9feef6091e0f27a2618e3f812f42008
git bisect good faca64f1b59762341c14e6c9e9b1ab39545b2351
# good: [dc1c762897b4c6d42bebe60368d24fda89634cde] source sha:64db723b2047cf566b652c11c94d9d589df0b930
git bisect good dc1c762897b4c6d42bebe60368d24fda89634cde
# good: [08c69d30692442c12e069a30d29c9109d8a242d9] source sha:33d1e38baf86378d34fd59e7a86c59ec8e16973c
git bisect good 08c69d30692442c12e069a30d29c9109d8a242d9
# good: [a7cee1f6203ec4b05108e3894fa70c5317149172] source sha:f1a7b8275e9c301bbfa3a7a0df3a5209ca3cff62
git bisect good a7cee1f6203ec4b05108e3894fa70c5317149172
# bad: [6e77cf663217bb333eb0b818a2c9291cd37625bd] source sha:717ce6838b7ef0add1f9a9655e2b8c0bf60203f0
git bisect bad 6e77cf663217bb333eb0b818a2c9291cd37625bd
# good: [fc11f0686cc9aed89677ea83d10bd94823fda1e3] source sha:23762a704133051184850fc711e44bc9a112f59a
git bisect good fc11f0686cc9aed89677ea83d10bd94823fda1e3
# first bad commit: [6e77cf663217bb333eb0b818a2c9291cd37625bd] source sha:717ce6838b7ef0add1f9a9655e2b8c0bf60203f0