grep.c: remove implicit dependency on the_index

diff --git a/builtin/get-tar-commit-id.c b/builtin/get-tar-commit-id.c
index 6d9a79f9b39834d953685b2641354915df3cfcbe..2706fcfaf2261e2ac2eaff5a054d0dd7a9291c0b 100644 (file)
--- a/builtin/get-tar-commit-id.c
+++ b/builtin/get-tar-commit-id.c
@@ -26,8 +26,10 @@ int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
                usage(builtin_get_tar_commit_id_usage);
 
        n = read_in_full(0, buffer, HEADERSIZE);
-       if (n < HEADERSIZE)
-               die("git get-tar-commit-id: read error");
+       if (n < 0)
+               die_errno("git get-tar-commit-id: read error");
+       if (n != HEADERSIZE)
+               die_errno("git get-tar-commit-id: EOF before reading tar header");
        if (header->typeflag[0] != 'g')
                return 1;
        if (!skip_prefix(content, "52 comment=", &comment))