Add fix for crash from grep, add test case.

1 files changed, 1 insertions, 1 deletions

diff --git a/dfa.c b/dfa.c
index 0c110548..228c9090 100644
--- a/dfa.c
+++ b/dfa.c
@@ -2137,7 +2137,7 @@ dfaanalyze (struct dfa *d, int searchflag)
   MALLOC(lastpos, position, d->nleaves);
   o_lastpos = lastpos, lastpos += d->nleaves;
   CALLOC(nalloc, int, d->tindex);
-  MALLOC(merged.elems, position, d->nleaves);
+  MALLOC(merged.elems, position, 2 * d->nleaves);
 
   CALLOC(d->follows, position_set, d->tindex);