[INFO] cloning repository https://github.com/Liuzhichao99/Rust-2021-Exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Liuzhichao99/Rust-2021-Exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiuzhichao99%2FRust-2021-Exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiuzhichao99%2FRust-2021-Exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8b92d766e2bed3bb2a668629dc6416893a19ed9
[INFO] checking Liuzhichao99/Rust-2021-Exercise against try#349c4bfa6ac87b818f6fd19d4869c0b24790ac6a for pr-152856
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiuzhichao99%2FRust-2021-Exercise" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Liuzhichao99/Rust-2021-Exercise
[INFO] finished tweaking git repo https://github.com/Liuzhichao99/Rust-2021-Exercise
[INFO] tweaked toml for git repo https://github.com/Liuzhichao99/Rust-2021-Exercise written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Liuzhichao99/Rust-2021-Exercise on toolchain 349c4bfa6ac87b818f6fd19d4869c0b24790ac6a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Liuzhichao99/Rust-2021-Exercise 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" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking Liuzhichao99/Rust-2021-Exercise against try#349c4bfa6ac87b818f6fd19d4869c0b24790ac6a for pr-152856
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiuzhichao99%2FRust-2021-Exercise" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Liuzhichao99/Rust-2021-Exercise
[INFO] finished tweaking git repo https://github.com/Liuzhichao99/Rust-2021-Exercise
[INFO] tweaked toml for git repo https://github.com/Liuzhichao99/Rust-2021-Exercise written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Liuzhichao99/Rust-2021-Exercise on toolchain 349c4bfa6ac87b818f6fd19d4869c0b24790ac6a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Liuzhichao99/Rust-2021-Exercise 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" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65d138f13cf41959a21623e749a882f037a46b24c1d71605cde4e5858fa7c498
[INFO] running `Command { std: "docker" "start" "-a" "65d138f13cf41959a21623e749a882f037a46b24c1d71605cde4e5858fa7c498", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65d138f13cf41959a21623e749a882f037a46b24c1d71605cde4e5858fa7c498", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d138f13cf41959a21623e749a882f037a46b24c1d71605cde4e5858fa7c498", kill_on_drop: false }`
[INFO] [stdout] 65d138f13cf41959a21623e749a882f037a46b24c1d71605cde4e5858fa7c498
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+349c4bfa6ac87b818f6fd19d4869c0b24790ac6a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9afa3fc4f415e1b5f6ae1e399a4f2016fe94267761aaa7a2121e4eeaee8a263
[INFO] running `Command { std: "docker" "start" "-a" "c9afa3fc4f415e1b5f6ae1e399a4f2016fe94267761aaa7a2121e4eeaee8a263", kill_on_drop: false }`
[INFO] [stderr]     Checking Rust-2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/p1ProgramStructure.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn f1() {
[INFO] [stdout]   |    ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/p1ProgramStructure.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn f1() {
[INFO] [stdout]   |    ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `p1ProgramStructure` should have a snake case name
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod p1ProgramStructure;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `p1_program_structure`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `p1ProgramStructure` should have a snake case name
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod p1ProgramStructure;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `p1_program_structure`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] running `Command { std: "docker" "inspect" "c9afa3fc4f415e1b5f6ae1e399a4f2016fe94267761aaa7a2121e4eeaee8a263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9afa3fc4f415e1b5f6ae1e399a4f2016fe94267761aaa7a2121e4eeaee8a263", kill_on_drop: false }`
[INFO] [stdout] c9afa3fc4f415e1b5f6ae1e399a4f2016fe94267761aaa7a2121e4eeaee8a263