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patch 8.2.2121: internal error when using \ze before \zs in a pattern

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Problem:    Internal error when using \ze before \zs in a pattern.
Solution:   Check the end is never before the start. (closes #7442)
This commit is contained in:
Bram Moolenaar
2020-12-09 16:36:04 +01:00
parent 730677a0da
commit a7a691cc14
4 changed files with 43 additions and 0 deletions
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17
src/regexp_bt.c
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@@ -4805,6 +4805,23 @@ theend:
if (backpos.ga_maxlen > BACKPOS_INITIAL)
ga_clear(&backpos);
// Make sure the end is never before the start. Can happen when \zs and
// \ze are used.
if (REG_MULTI)
{
lpos_T *start = &rex.reg_mmatch->startpos[0];
lpos_T *end = &rex.reg_mmatch->endpos[0];
if (end->lnum < start->lnum
|| (end->lnum == start->lnum && end->col < start->col))
rex.reg_mmatch->endpos[0] = rex.reg_mmatch->startpos[0];
}
else
{
if (rex.reg_match->endp[0] < rex.reg_match->startp[0])
rex.reg_match->endp[0] = rex.reg_match->startp[0];
}
return retval;
}