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patch 8.2.1259: empty group in 'tabline' may cause using an invalid pointer

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Problem:    Empty group in 'tabline' may cause using an invalid pointer.
Solution:   Set the group start position. (closes #6505)
This commit is contained in:
Bram Moolenaar
2020-07-21 19:25:18 +02:00
parent 08815a1d03
commit f56c95fdad
3 changed files with 33 additions and 1 deletions
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9
src/buffer.c
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@@ -4229,12 +4229,19 @@ build_stl_str_hl(
}
if (n == curitem && group_start_userhl == group_end_userhl)
{
// empty group
p = t;
l = 0;
// do not use the highlighting from the removed group
for (n = groupitem[groupdepth] + 1; n < curitem; n++)
{
// do not use the highlighting from the removed group
if (item[n].type == Highlight)
item[n].type = Empty;
// adjust the start position of TabPage to the next
// item position
if (item[n].type == TabPage)
item[n].start = p;
}
}
}
if (l > item[groupitem[groupdepth]].maxwid)