~/win64-6.4
$ git bisect good
4de430d51872967c8bfd187375eb3b05a76d6754 is the first bad commit
commit 4de430d51872967c8bfd187375eb3b05a76d6754
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Fri Sep 27 01:44:00 2019 -0700

    source sha:e9e6d4b058e13165f3dde1ca7822eec97dfe8aa7

    source sha:e9e6d4b058e13165f3dde1ca7822eec97dfe8aa7

:040000 040000 88589f7776f80f8fb1cbaa0e68e182423dc1963c a1c7f2b8a2fd862b8ed9263f573af9b9e598f251 M      instdir

 ~/win64-6.4
$ git bisect log
# bad: [75af2782b7f006d1c31ad11e84d5ab6bd7f74ed0] source sha:20be5cd0bdc57d812bf34a2debfe48caa51de881
# good: [8d1eaf05d47fd1c56ddecbe57a9a7c8289ede7f4] source sha:c98b1f1cd43b3e109bcaf6324ef2d1f449b34099
git bisect start 'origin/master' 'oldest'
# good: [e13037966b62b9d258d5cf6d96586de5e2bafea8] source sha:4a0b2b8024fa6fb8a0ab3e474b7d64fc455028b5
git bisect good e13037966b62b9d258d5cf6d96586de5e2bafea8
# bad: [7cba838374e1acd7b8a6e114d7b12bf6370cd7ab] source sha:d6ea967e040d01ec69649ac689472018e477db34
git bisect bad 7cba838374e1acd7b8a6e114d7b12bf6370cd7ab
# good: [f57765d2816781c79fc36e1d4955bff1c5c92f8d] source sha:130b0ffd491015df2dc1d6b272952d76980f0465
git bisect good f57765d2816781c79fc36e1d4955bff1c5c92f8d
# bad: [a7b64dca03ebbcf8e90e81323709f63a403e3e2e] source sha:9db8406b839df8a892d025e054e818def4a60edc
git bisect bad a7b64dca03ebbcf8e90e81323709f63a403e3e2e
# bad: [f9a2f70b62d51930a60372395ca5fd716cd6f8ab] source sha:8e2e03b1c36375735c4fcfa44ba762d0cbc4ef29
git bisect bad f9a2f70b62d51930a60372395ca5fd716cd6f8ab
# good: [a0de6f54ac5fac44a4233c8a6cfa47ee3a303ad4] source sha:ebd37bcc22d0c70cc1e4fdd8e4f3d2f8fc256cd8
git bisect good a0de6f54ac5fac44a4233c8a6cfa47ee3a303ad4
# bad: [4cb5356f7b13f73fc77c12a941dcf6eb839e0a08] source sha:9c9b1e95ae4c407cf0f462c4e1a64fcc303399d6
git bisect bad 4cb5356f7b13f73fc77c12a941dcf6eb839e0a08
# bad: [2086fcd585b4729dd63321cea1cc31bea44ab90c] source sha:d4a037a1d9e6331b7ff3423ef34b8c06530c55fc
git bisect bad 2086fcd585b4729dd63321cea1cc31bea44ab90c
# good: [012d5ce5fb6de2506fc5ab90e859e600835a1ed1] source sha:d630f69d90f15bc652a62648b05ea515de78d16a
git bisect good 012d5ce5fb6de2506fc5ab90e859e600835a1ed1
# bad: [230d097c53e698582918e8355494ef1378642f22] source sha:b7b854ab05e814dffac7d10b565584bbf705af43
git bisect bad 230d097c53e698582918e8355494ef1378642f22
# bad: [44973ba6d699bd0198a998f23929724ae25847f1] source sha:e8599a29c6540c05802d257671f3f4c572c73abc
git bisect bad 44973ba6d699bd0198a998f23929724ae25847f1
# bad: [4de430d51872967c8bfd187375eb3b05a76d6754] source sha:e9e6d4b058e13165f3dde1ca7822eec97dfe8aa7
git bisect bad 4de430d51872967c8bfd187375eb3b05a76d6754
# good: [f656cbd89851fed77b8ec821f07a9a3d5b2f34d8] source sha:ffa97dfc53ef902fe478f264c51989bd4c4434d1
git bisect good f656cbd89851fed77b8ec821f07a9a3d5b2f34d8
# first bad commit: [4de430d51872967c8bfd187375eb3b05a76d6754] source sha:e9e6d4b058e13165f3dde1ca7822eec97dfe8aa7