blockchain: some debug info when adding txes-from-block fails

src/cryptonote_core/blockchain.cpp

@@ -3688,6 +3688,8 @@ leave:
         //TODO: why is this done?  make sure that keeping invalid blocks makes sense.
         add_block_as_invalid(bl, id);
         MERROR_VER("Block with id " << id << " added as invalid because of wrong inputs in transactions");
+        MERROR_VER("tx_index " << tx_index << ", m_blocks_txs_check " << m_blocks_txs_check.size() << ":");
+        for (const auto &h: m_blocks_txs_check) MERROR_VER("  " << h);
         bvc.m_verifivation_failed = true;
         return_tx_to_pool(txs);
         goto leave;