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patch 8.1.0098: segfault when pattern with \z() is very slow

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Problem:    Segfault when pattern with \z() is very slow.
Solution:   Check for NULL regprog.  Add "nfa_fail" to test_override() to be
            able to test this.  Fix that 'searchhl' resets called_emsg.
This commit is contained in:
Bram Moolenaar
2018-06-23 14:21:42 +02:00
parent 5efa0102de
commit bcf9442307
10 changed files with 45 additions and 8 deletions
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6
src/syntax.c
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@@ -3327,6 +3327,12 @@ syn_regexec(
profile_start(&pt);
#endif
if (rmp->regprog == NULL)
// This can happen if a previous call to vim_regexec_multi() tried to
// use the NFA engine, which resulted in NFA_TOO_EXPENSIVE, and
// compiling the pattern with the other engine fails.
return FALSE;
rmp->rmm_maxcol = syn_buf->b_p_smc;
r = vim_regexec_multi(rmp, syn_win, syn_buf, lnum, col,
#ifdef FEAT_RELTIME