git bisect start
# status: waiting for both good and bad commits
# good: [602c91f4d1b01b76f559450d216846d0c1c599fb] PowerPC: Fix dmxxshake128pad test case for big-endian targets
git bisect good 602c91f4d1b01b76f559450d216846d0c1c599fb
# status: waiting for bad commit, 1 good commit known
# bad: [e4fe38115fea0a9f357527959893f18ca8d51a03] gdb/python: fix gdb.FinishBreakpoint returning to a tail call frame
git bisect bad e4fe38115fea0a9f357527959893f18ca8d51a03
# bad: [f225887d654232b9c33d47cccceeb25f5f55c7ad] gdb: use builtin_func_ptr for `$_` set by "x/i"
git bisect bad f225887d654232b9c33d47cccceeb25f5f55c7ad
# bad: [030f56e0e82cd98f52a4afa468e6612d3454c57f] gdb/python: introduce gdb.Symtab.source_lines method
git bisect bad 030f56e0e82cd98f52a4afa468e6612d3454c57f
# bad: [8012cfca41d9379e436a404d21c00df0ea126d28] gdb: return optional from last_symtab_line, and use this more
git bisect bad 8012cfca41d9379e436a404d21c00df0ea126d28
# bad: [ee89a3c9eff5aa2d1345a1a1b258e3ed87945ed2] gdb/python: new selected_context event
git bisect bad ee89a3c9eff5aa2d1345a1a1b258e3ed87945ed2
# first bad commit: [ee89a3c9eff5aa2d1345a1a1b258e3ed87945ed2] gdb/python: new selected_context event
# first bad commit: [ee89a3c9eff5aa2d1345a1a1b258e3ed87945ed2] gdb/python: new selected_context event