add back cfg

Dockerfile

@@ -1,5 +1,5 @@
 ARG BUILD_PLATFORM=linux/amd64
-ARG RUST_VERSION=1.83
+ARG RUST_VERSION=1.81
 FROM --platform=${BUILD_PLATFORM} rust:${RUST_VERSION} AS builder
 
 RUN rustup target add x86_64-unknown-linux-gnu

main/src/main.rs

@@ -1,6 +1,9 @@
 // Copyright 2023-2024, Offchain Labs, Inc.
 // For licensing, see https://github.com/OffchainLabs/cargo-stylus/blob/main/licenses/COPYRIGHT.md
 
+// Enable unstable test feature for benchmarks when nightly is available
+#![cfg_attr(feature = "nightly", feature(test))]
+
 use alloy_primitives::TxHash;
 use clap::{ArgGroup, Args, CommandFactory, Parser, Subcommand};
 use constants::DEFAULT_ENDPOINT;

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.83.0"
+channel = "1.81.0"