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-rw-r--r--builtin/cat-file.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 707330499f..f8d81291b9 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -82,8 +82,9 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
enum object_type type;
unsigned long size;
char *buffer = read_sha1_file(sha1, &type, &size);
- if (memcmp(buffer, "object ", 7) ||
- get_sha1_hex(buffer + 7, blob_sha1))
+ const char *target;
+ if (!skip_prefix(buffer, "object ", &target) ||
+ get_sha1_hex(target, blob_sha1))
die("%s not a valid tag", sha1_to_hex(sha1));
free(buffer);
} else