[INFO] cloning repository https://github.com/0xYYY/ethernaut-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xYYY/ethernaut-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xYYY%2Fethernaut-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xYYY%2Fethernaut-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83c80e9484f89642240a10a16b071b98726f38e0
[INFO] checking 0xYYY/ethernaut-rs against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xYYY%2Fethernaut-rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0xYYY/ethernaut-rs on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/0xYYY/ethernaut-rs
[INFO] finished tweaking git repo https://github.com/0xYYY/ethernaut-rs
[INFO] tweaked toml for git repo https://github.com/0xYYY/ethernaut-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/0xYYY/ethernaut-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution13.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution18.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SignerMiddleware` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `SignerMiddleware` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Http` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Http` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Middleware` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Middleware` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Provider` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Provider` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MnemonicBuilder` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:4:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `MnemonicBuilder` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use ethers_signers::{coins_bip39::English, MnemonicBuilder, Signer};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Signer` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:4:61
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Signer` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use ethers_signers::{coins_bip39::English, MnemonicBuilder, Signer};
[INFO] [stdout]   |                                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Address` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Address` is already imported here
[INFO] [stdout] 9 | use ethers_core::types::Address;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution13.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ethers` is imported redundantly
[INFO] [stdout]  --> src/solutions/solution18.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ethers;
[INFO] [stdout]   |     ^^^^^^ the item `ethers` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SignerMiddleware` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `SignerMiddleware` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Http` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Http` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Middleware` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Middleware` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Provider` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:3:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Provider` is already imported here
[INFO] [stdout] 2 | use ethers_middleware::signer::SignerMiddleware;
[INFO] [stdout] 3 | use ethers_providers::{Http, Middleware, Provider};
[INFO] [stdout]   |                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MnemonicBuilder` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:4:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `MnemonicBuilder` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use ethers_signers::{coins_bip39::English, MnemonicBuilder, Signer};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Signer` is imported redundantly
[INFO] [stdout]  --> src/utils.rs:4:61
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Signer` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 4 | use ethers_signers::{coins_bip39::English, MnemonicBuilder, Signer};
[INFO] [stdout]   |                                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Address` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use ethers::prelude::*;
[INFO] [stdout]   |     ------------------ the item `Address` is already imported here
[INFO] [stdout] 9 | use ethers_core::types::Address;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 42.15s
[INFO] running `Command { std: "docker" "inspect" "c63dc3b6be0774440655d523ed7137ee05697a598f80245fa761ad20cae787f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c63dc3b6be0774440655d523ed7137ee05697a598f80245fa761ad20cae787f9", kill_on_drop: false }`
[INFO] [stdout] c63dc3b6be0774440655d523ed7137ee05697a598f80245fa761ad20cae787f9