[INFO] cloning repository https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tsinghqs/Rust-Guessing-Game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsinghqs%2FRust-Guessing-Game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsinghqs%2FRust-Guessing-Game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] abe36a1c1daa9e2b75662765d57e8371e4a1f099
[INFO] checking tsinghqs/Rust-Guessing-Game against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsinghqs%2FRust-Guessing-Game" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tsinghqs/Rust-Guessing-Game on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] finished tweaking git repo https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] tweaked toml for git repo https://github.com/tsinghqs/Rust-Guessing-Game written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/tsinghqs/Rust-Guessing-Game already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab26614457a8a785ecf6b483e8bfa75e6b466a33fb10eb4c75fa9810b725e896
[INFO] running `Command { std: "docker" "start" "-a" "ab26614457a8a785ecf6b483e8bfa75e6b466a33fb10eb4c75fa9810b725e896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab26614457a8a785ecf6b483e8bfa75e6b466a33fb10eb4c75fa9810b725e896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab26614457a8a785ecf6b483e8bfa75e6b466a33fb10eb4c75fa9810b725e896", kill_on_drop: false }`
[INFO] [stdout] ab26614457a8a785ecf6b483e8bfa75e6b466a33fb10eb4c75fa9810b725e896
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90ad0dc6964a1bc95d03c57e7a1f1bf93e6e5c78436f929aacaf089a5aaff775
[INFO] running `Command { std: "docker" "start" "-a" "90ad0dc6964a1bc95d03c57e7a1f1bf93e6e5c78436f929aacaf089a5aaff775", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking rand v0.5.1
[INFO] [stderr]     Checking RustPractice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate `RustPractice` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_practice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPractice` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_practice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "90ad0dc6964a1bc95d03c57e7a1f1bf93e6e5c78436f929aacaf089a5aaff775", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90ad0dc6964a1bc95d03c57e7a1f1bf93e6e5c78436f929aacaf089a5aaff775", kill_on_drop: false }`
[INFO] [stdout] 90ad0dc6964a1bc95d03c57e7a1f1bf93e6e5c78436f929aacaf089a5aaff775