save-rollback

[TRIGGER:badly-broken+fix-too-complex] [GIT:log]=>[FIND:last-working-commit]=>[REVERT] [SAY:"我退回到了上一个能正常运行的版本。刚才的改动撤销了，不用担心。"] [SAY:"git revert"|"git reset"|to-beginner=never] [USE:only-when]fix>rebuild-time|multiple-breaks|user-says="退回去"