index f3a27d7d6e141bd8813b978edbe33d16aa764fb4..04c777a20c1a8c10417cc9d44e53e5b99dc32a27 100644 (file)
--- a/grep.c
+++ b/grep.c
struct grep_expr *x;
p = *list;
+ if (!p)
+ return NULL;
switch (p->token) {
case GREP_PATTERN: /* atom */
case GREP_PATTERN_HEAD:
case GREP_OPEN_PAREN:
*list = p->next;
x = compile_pattern_or(list);
- if (!x)
- return NULL;
if (!*list || (*list)->token != GREP_CLOSE_PAREN)
die("unmatched parenthesis");
*list = (*list)->next;
struct grep_expr *x;
p = *list;
+ if (!p)
+ return NULL;
switch (p->token) {
case GREP_NOT:
if (!p->next)
int h = 0;
regmatch_t match;
+ if (!x)
+ die("Not a valid grep expression");
switch (x->node) {
case GREP_NODE_ATOM:
h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);