~/win64-6.4
$ git bisect good
eab923bf51ae86a2377cd903a3d51fd7a4d6033a is the first bad commit
commit eab923bf51ae86a2377cd903a3d51fd7a4d6033a
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Tue Aug 13 08:02:04 2019 -0700

    source sha:383032c50a3e3354f04200ce984a47ab9d2c5c67

    source sha:383032c50a3e3354f04200ce984a47ab9d2c5c67

:040000 040000 ad6531b02fe9f565cb4858f87043c94785aded90 1e9f0571f5abf4bfc0a88dc6a046bb112ec4d878 M      instdir

 ~/win64-6.4
$ git bisect log
# bad: [75af2782b7f006d1c31ad11e84d5ab6bd7f74ed0] source sha:20be5cd0bdc57d812bf34a2debfe48caa51de881
# good: [8d1eaf05d47fd1c56ddecbe57a9a7c8289ede7f4] source sha:c98b1f1cd43b3e109bcaf6324ef2d1f449b34099
git bisect start 'origin/master' 'oldest'
# bad: [e13037966b62b9d258d5cf6d96586de5e2bafea8] source sha:4a0b2b8024fa6fb8a0ab3e474b7d64fc455028b5
git bisect bad e13037966b62b9d258d5cf6d96586de5e2bafea8
# good: [dde05f09c4fd5a8703edae2f02f96565e7ec0fb8] source sha:1ebc9435849430c61bf41e48a84255a17152fbc9
git bisect good dde05f09c4fd5a8703edae2f02f96565e7ec0fb8
# good: [3572bcb07fe0c221b43181c9339e415b6e81054b] source sha:343bc8260d428f2fc3b61c82af25eda4adfc04e4
git bisect good 3572bcb07fe0c221b43181c9339e415b6e81054b
# bad: [52dc35f7cd0a5824f40ff1d96010380c9e68653f] source sha:7841194ed70385627b9f8f88315fb1d0b5b8147c
git bisect bad 52dc35f7cd0a5824f40ff1d96010380c9e68653f
# good: [26b7367f6f96f6095fb453d056cadbc2504e5857] source sha:b65a0b7fb7edbb15b2c1a534cc753afe4362c143
git bisect good 26b7367f6f96f6095fb453d056cadbc2504e5857
# good: [ddf11d8bcb45d25481649190c4c5c066cf326584] source sha:5c8d191d3f735173c8234b62deabbdfc40cc1e2f
git bisect good ddf11d8bcb45d25481649190c4c5c066cf326584
# bad: [cfea1f909ccbe84311f54c30f1ff70bad1928f6d] source sha:eceace1f688ef2a50dc298cb4149c5a84fcaa34e
git bisect bad cfea1f909ccbe84311f54c30f1ff70bad1928f6d
# bad: [eab923bf51ae86a2377cd903a3d51fd7a4d6033a] source sha:383032c50a3e3354f04200ce984a47ab9d2c5c67
git bisect bad eab923bf51ae86a2377cd903a3d51fd7a4d6033a
# good: [45b2b19c481e9e8d3962d679679939ef840029ec] source sha:b3edf85e0fe6ca03dc26e1bf531be82193bc9627
git bisect good 45b2b19c481e9e8d3962d679679939ef840029ec
# good: [4ff3a5cab88341c9cb8cad3b69ed1c3248b97114] source sha:7bc8c493a7c90bd9ff01e70d0ee653a741d9f61f
git bisect good 4ff3a5cab88341c9cb8cad3b69ed1c3248b97114
# good: [9147e955fdb6e81969870e883e62e782f4681ede] source sha:536ab2f3ba1e71badaaf98db9419ca7c7ddd7ac4
git bisect good 9147e955fdb6e81969870e883e62e782f4681ede
# good: [eae8c4c779b4417ad63ec1aca38a09f795ad2807] source sha:66063914e39f232efe2271d52e51a3458455d8b4
git bisect good eae8c4c779b4417ad63ec1aca38a09f795ad2807
# first bad commit: [eab923bf51ae86a2377cd903a3d51fd7a4d6033a] source sha:383032c50a3e3354f04200ce984a47ab9d2c5c67