ui-log: Prevent crash when given empty range search

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui-log.c b/ui-log.c
index bc0c02c..b9771fa 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -141,49 +141,49 @@ static const char *disambiguate_ref(const char *ref)
         unsigned char sha1[20];
         const char *longref;
 
         longref = fmt("refs/heads/%s", ref);
         if (get_sha1(longref, sha1) == 0)
                 return longref;
 
         return ref;
 }
 
 void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern,
                     char *path, int pager)
 {
         struct rev_info rev;
         struct commit *commit;
         const char *argv[] = {NULL, NULL, NULL, NULL, NULL};
         int argc = 2;
         int i, columns = 3;
 
         if (!tip)
                 tip = ctx.qry.head;
 
         argv[1] = disambiguate_ref(tip);
 
-        if (grep && pattern) {
+        if (grep && pattern && *pattern) {
                 if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
                     !strcmp(grep, "committer"))
                         argv[argc++] = fmt("--%s=%s", grep, pattern);
                 if (!strcmp(grep, "range"))
                         argv[1] = pattern;
         }
 
         if (path) {
                 argv[argc++] = "--";
                 argv[argc++] = path;
         }
         init_revisions(&rev, NULL);
         rev.abbrev = DEFAULT_ABBREV;
         rev.commit_format = CMIT_FMT_DEFAULT;
         rev.verbose_header = 1;
         rev.show_root_diff = 0;
         setup_revisions(argc, argv, &rev, NULL);
         load_ref_decorations(DECORATE_FULL_REFS);
         rev.show_decorations = 1;
         rev.grep_filter.regflags |= REG_ICASE;
         compile_grep_patterns(&rev.grep_filter);
         prepare_revision_walk(&rev);
 
         if (pager)