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-rw-r--r--read-cache.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/read-cache.c b/read-cache.c
index eeb1c9e8f7..63a792e578 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -3010,6 +3010,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
!is_null_oid(&istate->split_index->base_oid)) {
struct strbuf sb = STRBUF_INIT;
+ if (istate->sparse_index)
+ die(_("cannot write split index for a sparse index"));
+
err = write_link_extension(&sb, istate) < 0 ||
write_index_ext_header(f, eoie_c, CACHE_EXT_LINK,
sb.len) < 0;