commit https://github.com/vim/vim/commit/9730f74a0b2acb490943393a203a24ab8fab923a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 28 19:50:51 2016 +0100 patch 7.4.1454 Problem: The exit callback test is flaky. Solution: Loop to wait for a short time up to a second.

/* 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);