diff --git a/sha1_name.c b/sha1_name.c
index 00fc4151780a4e66b70a78ac30d4798ad69b976e..77299257bf3aa91079d5b883c6676afa6fd2d01c 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
unsigned long co_time;
int co_tz, co_cnt;
+ /* a @{-N} placed anywhere except the start is an error */
+ if (str[at+2] == '-')
+ return -1;
+
/* Is it asking for N-th entry, or approxidate? */
for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
char ch = str[at+2+i];