[INFO] cloning repository https://github.com/hjmkt/rfol
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hjmkt/rfol" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjmkt%2Frfol", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjmkt%2Frfol'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 99307248b60ce5aa66ec93ee98c65b8736cdcbe0
[INFO] checking hjmkt/rfol against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjmkt%2Frfol" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hjmkt/rfol
[INFO] finished tweaking git repo https://github.com/hjmkt/rfol
[INFO] tweaked toml for git repo https://github.com/hjmkt/rfol written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hjmkt/rfol on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hjmkt/rfol 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" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_matches v1.4.0
[INFO] [stderr]   Downloaded libc v0.2.82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62
[INFO] running `Command { std: "docker" "start" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62", 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" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62", 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" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking assert_matches v1.4.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rfol v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `last` is never used
[INFO] [stdout]    --> src/proof.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 108 | impl LK {
[INFO] [stdout]     | ------- method in this implementation
[INFO] [stdout] 109 |     pub fn last(&self) -> &Sequent {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Proof` is never used
[INFO] [stdout]    --> src/proof.rs:330:11
[INFO] [stdout]     |
[INFO] [stdout] 330 | pub trait Proof {
[INFO] [stdout]     |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `last` is never used
[INFO] [stdout]    --> src/proof.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 108 | impl LK {
[INFO] [stdout]     | ------- method in this implementation
[INFO] [stdout] 109 |     pub fn last(&self) -> &Sequent {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Proof` is never used
[INFO] [stdout]    --> src/proof.rs:330:11
[INFO] [stdout]     |
[INFO] [stdout] 330 | pub trait Proof {
[INFO] [stdout]     |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.24s
[INFO] running `Command { std: "docker" "inspect" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62", kill_on_drop: false }`
[INFO] [stdout] 1083acfd8842d3c9a5bade03f553c971e2cb2e721a0df3f3babebb353afd3c62
