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patch 8.0.1073: may get an endless loop if 'statusline' changes a highlight

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Problem:    May get an endless loop if 'statusline' changes a highlight.
Solution:   Do not let evaluating 'statusline' trigger a redraw.
This commit is contained in:
Bram Moolenaar
2017-09-08 13:59:21 +02:00
parent 99433291b1
commit ba2929b6af
2 changed files with 18 additions and 6 deletions
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22
src/buffer.c
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@@ -3915,8 +3915,8 @@ build_stl_str_hl(
char_u *t;
int byteval;
#ifdef FEAT_EVAL
win_T *o_curwin;
buf_T *o_curbuf;
win_T *save_curwin;
buf_T *save_curbuf;
#endif
int empty_line;
colnr_T virtcol;
@@ -3958,6 +3958,9 @@ build_stl_str_hl(
char_u tmp[TMPLEN];
char_u *usefmt = fmt;
struct stl_hlrec *sp;
int save_must_redraw = must_redraw;
int save_redr_type = curwin->w_redr_type;
int save_highlight_shcnaged = need_highlight_changed;
#ifdef FEAT_EVAL
/*
@@ -4267,15 +4270,15 @@ build_stl_str_hl(
vim_snprintf((char *)tmp, sizeof(tmp), "%d", curbuf->b_fnum);
set_internal_string_var((char_u *)"actual_curbuf", tmp);
o_curbuf = curbuf;
o_curwin = curwin;
save_curbuf = curbuf;
save_curwin = curwin;
curwin = wp;
curbuf = wp->w_buffer;
str = eval_to_string_safe(p, &t, use_sandbox);
curwin = o_curwin;
curbuf = o_curbuf;
curwin = save_curwin;
curbuf = save_curbuf;
do_unlet((char_u *)"g:actual_curbuf", TRUE);
if (str != NULL && *str != 0)
@@ -4730,6 +4733,13 @@ build_stl_str_hl(
sp->userhl = 0;
}
/* We do not want redrawing a stausline, ruler, title, etc. to trigger
* another redraw, it may cause an endless loop. This happens when a
* statusline changes a highlight group. */
must_redraw = save_must_redraw;
curwin->w_redr_type = save_redr_type;
need_highlight_changed = save_highlight_shcnaged;
return width;
}
#endif /* FEAT_STL_OPT */