block-sha1: split the different "hacks" to be individually selected

diff --git a/read-cache.c b/read-cache.c
index f76b5bb2e13a06fbc393a2344f0310ee5e702594..4e3e272ee409de66de2059a8be475fddcaa4dc28 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -1265,7 +1265,7 @@ int read_index_from(struct index_state *istate, const char *path)
        mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
        close(fd);
        if (mmap == MAP_FAILED)
-               die("unable to map index file");
+               die_errno("unable to map index file");
 
        hdr = mmap;
        if (verify_hdr(hdr, mmap_size) < 0)