if (item_size < sizeof(*ei)) {
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
struct btrfs_extent_item_v0 *ei0;
- BUG_ON(item_size != sizeof(*ei0));
+ if (item_size != sizeof(*ei0)) {
+ error(
+ "invalid extent item format: ITEM[%llu %u %llu] leaf: %llu slot: %d",
+ key.objectid, key.type, key.offset,
+ btrfs_header_bytenr(eb), slot);
+ BUG();
+ }
ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
refs = btrfs_extent_refs_v0(eb, ei0);
#else