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-rw-r--r--read-cache.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/read-cache.c b/read-cache.c
index 35fec46..a857c8e 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1118,6 +1118,10 @@ static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_en
ce->ce_size = ntohl(ondisk->size);
/* On-disk flags are just 16 bits */
ce->ce_flags = ntohs(ondisk->flags);
+
+ /* For future extension: we do not understand this entry yet */
+ if (ce->ce_flags & CE_EXTENDED)
+ die("Unknown index entry format");
hashcpy(ce->sha1, ondisk->sha1);
len = ce->ce_flags & CE_NAMEMASK;