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-rw-r--r--builtin/index-pack.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index acdda17d84..d967d188a3 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -1004,7 +1004,9 @@ static struct base_data *find_unresolved_deltas_1(struct base_data *base,
if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
base->obj->real_type))
- BUG("child->real_type != OBJ_REF_DELTA");
+ die("REF_DELTA at offset %"PRIuMAX" already resolved (duplicate base %s?)",
+ (uintmax_t)child->idx.offset,
+ oid_to_hex(&base->obj->idx.oid));
resolve_delta(child, base, result);
if (base->ref_first == base->ref_last && base->ofs_last == -1)