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Don't walk rightmost through NULL pointers.

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This commit is contained in:
Alasdair Kergon 2010-04-22 14:33:14 +00:00
parent 6d3dd87bba
commit 0e8134800e
1 changed files with 1 additions and 3 deletions
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4
libdm/regex/parse_rx.c
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@ -16,8 +16,6 @@
#include "dmlib.h" #include "dmlib.h"
#include "parse_rx.h" #include "parse_rx.h"
#include <ctype.h>
struct parse_sp { /* scratch pad for the parsing process */ struct parse_sp { /* scratch pad for the parsing process */
struct dm_pool *mem; struct dm_pool *mem;
int type; /* token type, 0 indicates a charset */ int type; /* token type, 0 indicates a charset */
@ -345,7 +343,7 @@ static unsigned _depth(struct rx_node *r, unsigned leftmost)
{ {
int count = 1; int count = 1;
while (r->type != CHARSET) { while (r->type != CHARSET && LEFT(r)) {
count++; count++;
r = LEFT(r); r = LEFT(r);
} }