patch 8.2.3916: no error for passing an invalid line number to append() Commit: https://github.com/vim/vim/commit/8dac2acd6a79d571ff5409d9c90b4c9e73237eb4 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Dec 27 20:57:06 2021 +0000 patch 8.2.3916: no error for passing an invalid line number to append() Problem: No error for passing an invalid line number to append(). Solution: In Vim9 script check for a non-negative number. (closes https://github.com/vim/vim/issues/9417)

/* beval.c */
int find_word_under_cursor(int mouserow, int mousecol, int getword, int flags, win_T **winp, linenr_T *lnump, char_u **textp, int *colp, int *startcolp);
int get_beval_info(BalloonEval *beval, int getword, win_T **winp, linenr_T *lnump, char_u **textp, int *colp);
void post_balloon(BalloonEval *beval, char_u *mesg, list_T *list);
int can_use_beval(void);
void general_beval_cb(BalloonEval *beval, int state);
/* vim: set ft=c : */