avoid null SHA1 in oldest reflog

[git.git] / refs.c

diff --git a/refs.c b/refs.c
index 9e8e8581ba981ca88366b614f1e8749cfe8a6ae5..6c6e9e5e1963e74307266b432e58a5fe51a9ce39 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1412,6 +1412,10 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
        tz = strtoul(tz_c, NULL, 10);
        if (get_sha1_hex(logdata, sha1))
                die("Log %s is corrupt.", logfile);
+       if (is_null_sha1(sha1)) {
+               if (get_sha1_hex(logdata + 41, sha1))
+                       die("Log %s is corrupt.", logfile);
+       }
        if (msg)
                *msg = ref_msg(logdata, logend);
        munmap(log_mapped, mapsz);