[INFO] cloning repository https://github.com/vacekto/Rust-Basics-Syntax-and-Variables
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vacekto/Rust-Basics-Syntax-and-Variables" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvacekto%2FRust-Basics-Syntax-and-Variables", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvacekto%2FRust-Basics-Syntax-and-Variables'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38aa558a1a12726e0c2c5e04ff51a8e0e583ffb6
[INFO] checking vacekto/Rust-Basics-Syntax-and-Variables against try#7d2afcda7a9c043d5175cbca3ab08f0acf02b13a for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvacekto%2FRust-Basics-Syntax-and-Variables" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vacekto/Rust-Basics-Syntax-and-Variables on toolchain 7d2afcda7a9c043d5175cbca3ab08f0acf02b13a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vacekto/Rust-Basics-Syntax-and-Variables
[INFO] finished tweaking git repo https://github.com/vacekto/Rust-Basics-Syntax-and-Variables
[INFO] tweaked toml for git repo https://github.com/vacekto/Rust-Basics-Syntax-and-Variables written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/vacekto/Rust-Basics-Syntax-and-Variables 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" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded slug v0.1.6
[INFO] [stderr]   Downloaded deunicode v1.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e91b9efa9161d9bf60a053656ba3e88d8d45155c2304984b9f4152bb29e3f25
[INFO] running `Command { std: "docker" "start" "-a" "2e91b9efa9161d9bf60a053656ba3e88d8d45155c2304984b9f4152bb29e3f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e91b9efa9161d9bf60a053656ba3e88d8d45155c2304984b9f4152bb29e3f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e91b9efa9161d9bf60a053656ba3e88d8d45155c2304984b9f4152bb29e3f25", kill_on_drop: false }`
[INFO] [stdout] 2e91b9efa9161d9bf60a053656ba3e88d8d45155c2304984b9f4152bb29e3f25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48ddcb5ac877da509387f836f07e6b421c9f40d2cf30a9013e45ded32cc6b4b9
[INFO] running `Command { std: "docker" "start" "-a" "48ddcb5ac877da509387f836f07e6b421c9f40d2cf30a9013e45ded32cc6b4b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking itoa v1.0.14
[INFO] [stderr]     Checking deunicode v1.6.0
[INFO] [stderr]     Checking ryu v1.0.19
[INFO] [stderr]     Checking slug v0.1.6
[INFO] [stderr]     Checking csv-core v0.1.12
[INFO] [stderr]     Checking csv v1.3.1
[INFO] [stderr]     Checking rust_basics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `io`
[INFO] [stdout]  --> src/main.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{env, io};
[INFO] [stdout]   |                ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io`
[INFO] [stdout]  --> src/main.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{env, io};
[INFO] [stdout]   |                ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.09s
[INFO] running `Command { std: "docker" "inspect" "48ddcb5ac877da509387f836f07e6b421c9f40d2cf30a9013e45ded32cc6b4b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48ddcb5ac877da509387f836f07e6b421c9f40d2cf30a9013e45ded32cc6b4b9", kill_on_drop: false }`
[INFO] [stdout] 48ddcb5ac877da509387f836f07e6b421c9f40d2cf30a9013e45ded32cc6b4b9