[INFO] cloning repository https://github.com/shenlehan/OJ-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shenlehan/OJ-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshenlehan%2FOJ-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshenlehan%2FOJ-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 937db21018c78bf533ad39290dd20e4cbdd81388
[INFO] checking shenlehan/OJ-Rust against c9ff496891c278ad660bc0ab85c1f0b72059464a for pr-160491
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshenlehan%2FOJ-Rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/shenlehan/OJ-Rust
[INFO] finished tweaking git repo https://github.com/shenlehan/OJ-Rust
[INFO] tweaked toml for git repo https://github.com/shenlehan/OJ-Rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shenlehan/OJ-Rust on toolchain c9ff496891c278ad660bc0ab85c1f0b72059464a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c9ff496891c278ad660bc0ab85c1f0b72059464a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/shenlehan/OJ-Rust 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" "+c9ff496891c278ad660bc0ab85c1f0b72059464a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1
[INFO] running `Command { std: "docker" "start" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1" "/opt/rustwide/cargo-home/bin/cargo" "+c9ff496891c278ad660bc0ab85c1f0b72059464a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1" "/opt/rustwide/cargo-home/bin/cargo" "+c9ff496891c278ad660bc0ab85c1f0b72059464a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]     Checking serde_urlencoded v0.7.1
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[INFO] [stderr]     Checking hyper v1.7.0
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[INFO] [stderr]     Checking oj v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `delete`, `get`, and `put`
[INFO] [stdout]  --> src/user_validation.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use actix_web::{HttpResponse, Responder, delete, get, post, put, web};
[INFO] [stdout]   |                                          ^^^^^^  ^^^        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `delete`, `get`, and `put`
[INFO] [stdout]  --> src/user_validation.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use actix_web::{HttpResponse, Responder, delete, get, post, put, web};
[INFO] [stdout]   |                                          ^^^^^^  ^^^        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::chain`
[INFO] [stdout]  --> src/run_usr_program.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::chain;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::chain`
[INFO] [stdout]  --> src/run_usr_program.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::chain;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/user_validation.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut submission = body.into_inner();
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/user_validation.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut submission = body.into_inner();
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `flush_data` is assigned to, but never used
[INFO] [stdout]  --> src/configs.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut flush_data = false;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_flush_data` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `flush_data` is never read
[INFO] [stdout]   --> src/configs.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |             flush_data = true;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `flush_data` is assigned to, but never used
[INFO] [stdout]  --> src/configs.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut flush_data = false;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_flush_data` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `flush_data` is never read
[INFO] [stdout]   --> src/configs.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |             flush_data = true;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/run_usr_program.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut out_file = File::create(&output_path)?;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/run_usr_program.rs:122:26
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let mut result = String::from("");
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 126 |                     result = "Runtime Error".to_string();
[INFO] [stdout]     |                     ------ `result` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/run_usr_program.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let mut out_file = File::create(&output_path)?;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/run_usr_program.rs:122:26
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let mut result = String::from("");
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 126 |                     result = "Runtime Error".to_string();
[INFO] [stdout]     |                     ------ `result` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 16s
[INFO] running `Command { std: "docker" "inspect" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1", kill_on_drop: false }`
[INFO] [stdout] ca7587f1c4bf548d245ca0c0c68bc573fe1244807efa85b77b30f71ecd73fdf1
