[INFO] cloning repository https://github.com/piperman/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/piperman/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiperman%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiperman%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53b43c80a6942907484d71567774c0bc2048dbfc
[INFO] checking piperman/hello-rust against try#4907eac94165faff6c5e5e015670b1c584275f7b for pr-154149
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiperman%2Fhello-rust" "/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/piperman/hello-rust
[INFO] finished tweaking git repo https://github.com/piperman/hello-rust
[INFO] tweaked toml for git repo https://github.com/piperman/hello-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/piperman/hello-rust on toolchain 4907eac94165faff6c5e5e015670b1c584275f7b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/piperman/hello-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" "+4907eac94165faff6c5e5e015670b1c584275f7b" "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 ferris-says v0.2.1
[INFO] [stderr]   Downloaded smawk v0.3.1
[INFO] [stderr]   Downloaded textwrap v0.13.4
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8cc6e45d85f89c023756a96fd807409d79c95814e523e56c9593854da197a83c
[INFO] running `Command { std: "docker" "start" "-a" "8cc6e45d85f89c023756a96fd807409d79c95814e523e56c9593854da197a83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cc6e45d85f89c023756a96fd807409d79c95814e523e56c9593854da197a83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cc6e45d85f89c023756a96fd807409d79c95814e523e56c9593854da197a83c", kill_on_drop: false }`
[INFO] [stdout] 8cc6e45d85f89c023756a96fd807409d79c95814e523e56c9593854da197a83c
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c94db480692237ec789e616247907a78082e12bb3bd3f76ce108daa44b73c229
[INFO] running `Command { std: "docker" "start" "-a" "c94db480692237ec789e616247907a78082e12bb3bd3f76ce108daa44b73c229", kill_on_drop: false }`
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking ferris-says v0.2.1
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Green`, `Orange`, and `Red` are never constructed
[INFO] [stdout]   --> src/bin/a7.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Colors {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 11 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     Yellow,
[INFO] [stdout] 13 |     Orange,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 14 |     Red
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/a8.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut fl;
[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/bin/a8.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut fl;
[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: variants `Green`, `Orange`, and `Red` are never constructed
[INFO] [stdout]   --> src/bin/a7.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Colors {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout] 11 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     Yellow,
[INFO] [stdout] 13 |     Orange,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 14 |     Red
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "c94db480692237ec789e616247907a78082e12bb3bd3f76ce108daa44b73c229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c94db480692237ec789e616247907a78082e12bb3bd3f76ce108daa44b73c229", kill_on_drop: false }`
[INFO] [stdout] c94db480692237ec789e616247907a78082e12bb3bd3f76ce108daa44b73c229