~/win64-6.5
$ git bisect bad
0de7fc751465fd26c1e1cd791052f3e9a154a9cd is the first bad commit
commit 0de7fc751465fd26c1e1cd791052f3e9a154a9cd
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Sat May 30 06:12:51 2020 -0700

    source sha:c644b2b4abe3051c0e0fc91674154c796fd326f6

    source sha:c644b2b4abe3051c0e0fc91674154c796fd326f6

:040000 040000 7f3b6e21fc9d8bb4151fb712184f9e16d48be6fb 45c0b15a7cedcd83026149f3666c61527e33f4b8 M      instdir

 ~/win64-6.5
$ git bisect log
# bad: [e81dce33f9408b434377713b586fbfde2925762b] source sha:2891e91a513520d68ea2b8c59c14335861a15253
# good: [832184dd45effc3d2a68e9010c4b8f1d0a70623a] source sha:9bc848cf0d301aa57eabcffa101a1cf87bad6470
git bisect start 'origin/master' 'oldest'
# good: [8769a12f2f4cc34c9780be6940faa0008491e8bf] source sha:f15d67442972c5f69c71925a6bfa5aa1a39d54eb
git bisect good 8769a12f2f4cc34c9780be6940faa0008491e8bf
# good: [8769a12f2f4cc34c9780be6940faa0008491e8bf] source sha:f15d67442972c5f69c71925a6bfa5aa1a39d54eb
git bisect good 8769a12f2f4cc34c9780be6940faa0008491e8bf
# good: [98515bf62171d4eb9e62d70a69c176a7928b240a] source sha:4102c4df3ae0446c9cdd55d64459d975ed18103f
git bisect good 98515bf62171d4eb9e62d70a69c176a7928b240a
# good: [98515bf62171d4eb9e62d70a69c176a7928b240a] source sha:4102c4df3ae0446c9cdd55d64459d975ed18103f
git bisect good 98515bf62171d4eb9e62d70a69c176a7928b240a
# good: [d4bbed923ab1b35b63eabfba729419e05c9afa85] source sha:58b57bce7927dfd0ff35cd3dffafa1ed4d0cced7
git bisect good d4bbed923ab1b35b63eabfba729419e05c9afa85
# good: [d4bbed923ab1b35b63eabfba729419e05c9afa85] source sha:58b57bce7927dfd0ff35cd3dffafa1ed4d0cced7
git bisect good d4bbed923ab1b35b63eabfba729419e05c9afa85
# good: [714fc76f36d459b1a66d03df84da8f799cdb0291] source sha:1a60d388b566754d5fe6cee12adf7252a3206167
git bisect good 714fc76f36d459b1a66d03df84da8f799cdb0291
# good: [33eb7a6d3f5d8181518d57af4a451018807220f4] source sha:d407019a69773156b0bb9ef0b4a775f67830949e
git bisect good 33eb7a6d3f5d8181518d57af4a451018807220f4
# good: [4a7691df2f774e64e6b7f04112f57d6e8a605a71] source sha:af4f6bd6632059138ff58f89a78f08c0b0ac0c83
git bisect good 4a7691df2f774e64e6b7f04112f57d6e8a605a71
# good: [db246b356b21e57bd1fdfc5f9a2d7d13bcb3a5dc] source sha:bd39ec554f90badccfb26c843fd0d43237f1b622
git bisect good db246b356b21e57bd1fdfc5f9a2d7d13bcb3a5dc
# good: [c24dc17cb44ecb7320458708c6a2983208bc800a] source sha:ec8069ce72ec55f8ed56dce01597b857a0b62f87
git bisect good c24dc17cb44ecb7320458708c6a2983208bc800a
# good: [71f7c3f267a1554e0a8c23eb2b79b72c51fe96f5] source sha:f510bdfa98014ca0ae596dcd0dfd487cfc90f3eb
git bisect good 71f7c3f267a1554e0a8c23eb2b79b72c51fe96f5
# bad: [4bee673a36b7860b0065c595abcdd85af0ece7c6] source sha:05dfd20fd42f57d681fb65d3fee6b5fe10f4ea1b
git bisect bad 4bee673a36b7860b0065c595abcdd85af0ece7c6
# bad: [881edac40441cddc652bfeacede7d47959fb8760] source sha:256c19a3b12a69e57b8e09375884a044315120ab
git bisect bad 881edac40441cddc652bfeacede7d47959fb8760
# bad: [d51451d938547be27748dacb0b17c6e8d091cbea] source sha:4166cf43d2a56b0c2e9a3bf4c15d906be025ada6
git bisect bad d51451d938547be27748dacb0b17c6e8d091cbea
# bad: [0de7fc751465fd26c1e1cd791052f3e9a154a9cd] source sha:c644b2b4abe3051c0e0fc91674154c796fd326f6
git bisect bad 0de7fc751465fd26c1e1cd791052f3e9a154a9cd
# first bad commit: [0de7fc751465fd26c1e1cd791052f3e9a154a9cd] source sha:c644b2b4abe3051c0e0fc91674154c796fd326f6