Import alloc types
@@ -28,7 +28,9 @@ mod costs;
mod memory;
mod utils;
+use alloc::boxed::Box;
use alloc::collections::BTreeSet;
+use alloc::vec::Vec;
use core::cmp::max;
use primitive_types::{H160, H256, U256};
use evm_core::{Opcode, ExitError, Stack};
