patch 8.1.0877: new buffer used every time the quickfix window is opened commit https://github.com/vim/vim/commit/ee8188fc74a7cf9ee7acb634b2bb7a032d0cb24c Author: Bram Moolenaar <Bram@vim.org> Date: Tue Feb 5 21:23:04 2019 +0100 patch 8.1.0877: new buffer used every time the quickfix window is opened Problem: New buffer used every time the quickfix window is opened. Solution: Reuse the buffer. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3902)

/* gui_beval.c */
BalloonEval *gui_mch_create_beval_area(void *target, char_u *mesg, void (*mesgCB)(BalloonEval *, int), void *clientData);
void gui_mch_destroy_beval_area(BalloonEval *beval);
void gui_mch_enable_beval_area(BalloonEval *beval);
void gui_mch_disable_beval_area(BalloonEval *beval);
BalloonEval *gui_mch_currently_showing_beval(void);
void gui_mch_post_balloon(BalloonEval *beval, char_u *mesg);
void gui_mch_unpost_balloon(BalloonEval *beval);
/* vim: set ft=c : */