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-rw-r--r--read-cache.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/read-cache.c b/read-cache.c
index b645827..7d4bf68 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1790,6 +1790,8 @@ int write_index(struct index_state *istate, int newfd)
continue;
if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce))
ce_smudge_racily_clean_entry(ce);
+ if (is_null_sha1(ce->sha1))
+ return error("cache entry has null sha1: %s", ce->name);
if (ce_write_entry(&c, newfd, ce, previous_name) < 0)
return -1;
}