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patch 8.1.2198: crash when using :center in autocommand

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Problem:    Crash when using :center in autocommand.
Solution:   Bail out early for an empty line. (Dominique pelle, closes #5095)
This commit is contained in:
Bram Moolenaar
2019-10-21 23:08:59 +02:00
parent 34ba06b6e6
commit 396b7c78c0
3 changed files with 31 additions and 4 deletions
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13
src/ex_cmds.c
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@@ -251,18 +251,23 @@ linelen(int *has_tab)
int save;
int len;
/* find the first non-blank character */
// Get the line. If it's empty bail out early (could be the empty string
// for an unloaded buffer).
line = ml_get_curline();
if (*line == NUL)
return 0;
// find the first non-blank character
first = skipwhite(line);
/* find the character after the last non-blank character */
// find the character after the last non-blank character
for (last = first + STRLEN(first);
last > first && VIM_ISWHITE(last[-1]); --last)
;
save = *last;
*last = NUL;
len = linetabsize(line); /* get line length */
if (has_tab != NULL) /* check for embedded TAB */
len = linetabsize(line); // get line length
if (has_tab != NULL) // check for embedded TAB
*has_tab = (vim_strchr(first, TAB) != NULL);
*last = save;