traverse_trees(): handle D/F conflict case sanely

diff --git a/builtin-blame.c b/builtin-blame.c
index d4e25a595dadba43223e84b20759ab49343aa33a..6408ec8ee6805fc42eb5e5dc52be6463d62128bf 100644 (file)
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -1305,6 +1305,7 @@ static void get_ac_line(const char *inbuf, const char *what,
        error_out:
                /* Ugh */
                *tz = "(unknown)";
+               strcpy(person, *tz);
                strcpy(mail, *tz);
                *time = 0;
                return;
@@ -1314,20 +1315,26 @@ static void get_ac_line(const char *inbuf, const char *what,
        tmp = person;
        tmp += len;
        *tmp = 0;
-       while (*tmp != ' ')
+       while (person < tmp && *tmp != ' ')
                tmp--;
+       if (tmp <= person)
+               goto error_out;
        *tz = tmp+1;
        tzlen = (person+len)-(tmp+1);
 
        *tmp = 0;
-       while (*tmp != ' ')
+       while (person < tmp && *tmp != ' ')
                tmp--;
+       if (tmp <= person)
+               goto error_out;
        *time = strtoul(tmp, NULL, 10);
        timepos = tmp;
 
        *tmp = 0;
-       while (*tmp != ' ')
+       while (person < tmp && *tmp != ' ')
                tmp--;
+       if (tmp <= person)
+               return;
        mailpos = tmp + 1;
        *tmp = 0;
        maillen = timepos - tmp;