commit https://github.com/vim/vim/commit/245c41070c7f37d52be43cce0cb140bd3ade6c7e Author: Bram Moolenaar <Bram@vim.org> Date: Wed Apr 20 17:37:41 2016 +0200 patch 7.4.1758 Problem: Triggering CursorHoldI when in CTRL-X mode causes problems. Solution: Do not trigger CursorHoldI in CTRL-X mode. Add "!" flag to feedkeys() (test with that didn't work though).

/* auto/if_perl.c */
int perl_enabled(int verbose);
void perl_end(void);
void msg_split(char_u *s, int attr);
void perl_win_free(win_T *wp);
void perl_buf_free(buf_T *bp);
void ex_perl(exarg_T *eap);
void do_perleval(char_u *str, typval_T *rettv);
void ex_perldo(exarg_T *eap);