git bisect start
# status: waiting for both good and bad commits
# good: [8946d80a18a08282c40854701a770536571e4aa3] Daily bump.
git bisect good 8946d80a18a08282c40854701a770536571e4aa3
# status: waiting for bad commit, 1 good commit known
# bad: [c7206efa282bdd121ae4bd5227b487d06c3874c2] widening_mul: Fix up .SAT_{ADD,SUB,MUL} pattern recognition [PR123372]
git bisect bad c7206efa282bdd121ae4bd5227b487d06c3874c2
# bad: [489423763d3c8b84d3409f4b200fb6b19ad96db3] Fortran: Generate a runtime error on recursive I/O
git bisect bad 489423763d3c8b84d3409f4b200fb6b19ad96db3
# good: [c715060dd6620967ae4f6e35340658701876228c] Update Copyright year in ChangeLog files
git bisect good c715060dd6620967ae4f6e35340658701876228c
# bad: [1e314be3ccc50dc7dcf0ad6c3aebe63cf025f4bf] [PATCH] [AutoFDO/devirt] Fix ICE with duplicate speculative ID
git bisect bad 1e314be3ccc50dc7dcf0ad6c3aebe63cf025f4bf
# first bad commit: [1e314be3ccc50dc7dcf0ad6c3aebe63cf025f4bf] [PATCH] [AutoFDO/devirt] Fix ICE with duplicate speculative ID
# first bad commit: [1e314be3ccc50dc7dcf0ad6c3aebe63cf025f4bf] [PATCH] [AutoFDO/devirt] Fix ICE with duplicate speculative ID