Hi Nicolas, I tested with `q' option, and the same issue: [C-c '] is undefined I tested with Emacs 25.1.50.1, night building of 2016-06-21, from emacsformacosx.com . --- Daniel ☵☯☲ 2016年6月15日 下午12:45,"Nicolas Goaziou" 写道: > Hello, > > Kejia柯嘉 writes: > > > I tried 8.3, but the issue is there, too. > > Did you try with "emacs -q" (or equivalent)? Also, what is the major > mode used in the code editing buffer? It may be rebinding . > > Regards, > > -- > Nicolas Goaziou >