~/win64-6.5
$ git bisect bad
c9d99e718484777f2407930b9bb670bc449132d9 is the first bad commit
commit c9d99e718484777f2407930b9bb670bc449132d9
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Mon Dec 23 03:13:48 2019 -0800

    source sha:68a5afaaabd0c75bba3439cfdff90fb75d1cdd3f

    source sha:68a5afaaabd0c75bba3439cfdff90fb75d1cdd3f

:040000 040000 23fe341ae6de6b48e5197671e542d234b9cec7d6 10912b4a7353dee1eb273b3d0b37509569242ed8 M      instdir

 ~/win64-6.5
$ git bisect log
# bad: [e81dce33f9408b434377713b586fbfde2925762b] source sha:2891e91a513520d68ea2b8c59c14335861a15253
# good: [832184dd45effc3d2a68e9010c4b8f1d0a70623a] source sha:9bc848cf0d301aa57eabcffa101a1cf87bad6470
git bisect start 'origin/master' 'oldest'
# bad: [8769a12f2f4cc34c9780be6940faa0008491e8bf] source sha:f15d67442972c5f69c71925a6bfa5aa1a39d54eb
git bisect bad 8769a12f2f4cc34c9780be6940faa0008491e8bf
# bad: [8769a12f2f4cc34c9780be6940faa0008491e8bf] source sha:f15d67442972c5f69c71925a6bfa5aa1a39d54eb
git bisect bad 8769a12f2f4cc34c9780be6940faa0008491e8bf
# bad: [77b373998be9e3add6ac24bde56a8d6e727fbf79] source sha:f8e29707df8ebb6acf33ac4e32033252953bc7ef
git bisect bad 77b373998be9e3add6ac24bde56a8d6e727fbf79
# bad: [77b373998be9e3add6ac24bde56a8d6e727fbf79] source sha:f8e29707df8ebb6acf33ac4e32033252953bc7ef
git bisect bad 77b373998be9e3add6ac24bde56a8d6e727fbf79
# good: [6192c062509a3a3fc2036469cdaca1a4d3a624c8] source sha:141722374d026d783bc1d2ab5656568105017d87
git bisect good 6192c062509a3a3fc2036469cdaca1a4d3a624c8
# good: [6192c062509a3a3fc2036469cdaca1a4d3a624c8] source sha:141722374d026d783bc1d2ab5656568105017d87
git bisect good 6192c062509a3a3fc2036469cdaca1a4d3a624c8
# good: [95c3e2177053d79c8f2048ccabaede595ffc8810] source sha:736229b20c94c502c91e2177fdd1719719c0a083
git bisect good 95c3e2177053d79c8f2048ccabaede595ffc8810
# good: [6dd6636875dcbae2331587ca8d994a0a0cf7045d] source sha:e994b3fc3b2c9b7d39a715fc4d9453e06434d457
git bisect good 6dd6636875dcbae2331587ca8d994a0a0cf7045d
# good: [dfaa768eaaf5ee384f168233cddbce033fb1f51f] source sha:2d5442dd1181ad0d261fe642a483383df6500848
git bisect good dfaa768eaaf5ee384f168233cddbce033fb1f51f
# bad: [0b5116df205bb49176f1f2f5284a6edca01daf24] source sha:d020273875e6e1f840d8c7e2b0d27402456925e8
git bisect bad 0b5116df205bb49176f1f2f5284a6edca01daf24
# good: [e36f4377b62e1d8510bab79bdcc02738fb783897] source sha:42f60e67e53c75d8a2eee9586d6ae8245ea984da
git bisect good e36f4377b62e1d8510bab79bdcc02738fb783897
# bad: [6c826bdc602583600280ecedd1761d33eb7175ed] source sha:40a7abaab8bead1b1f04774324b7d652ce7f75f1
git bisect bad 6c826bdc602583600280ecedd1761d33eb7175ed
# good: [399f47218ab8a03dcfec205fdafa26226840cdfe] source sha:2976a37ff7039d521c4d15a8387e9db9b27f89d8
git bisect good 399f47218ab8a03dcfec205fdafa26226840cdfe
# good: [d03aec42fa4c6703479cdb7a0be1b6f4a4e192ab] source sha:f3e0595fcba689b07f6419c2fb540731a3aadecf
git bisect good d03aec42fa4c6703479cdb7a0be1b6f4a4e192ab
# good: [19a072cce2278ad92a216ae076b9c7722ee7b8d3] source sha:8723ac4e20eda87a82393f2f6c7d28ece8514238
git bisect good 19a072cce2278ad92a216ae076b9c7722ee7b8d3
# bad: [c9d99e718484777f2407930b9bb670bc449132d9] source sha:68a5afaaabd0c75bba3439cfdff90fb75d1cdd3f
git bisect bad c9d99e718484777f2407930b9bb670bc449132d9
# first bad commit: [c9d99e718484777f2407930b9bb670bc449132d9] source sha:68a5afaaabd0c75bba3439cfdff90fb75d1cdd3f