[INFO] cloning repository https://github.com/bczhc/rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bczhc/rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbczhc%2Frust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbczhc%2Frust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d62a0006c5ca0026e229547b5339a72fa82faf5
[INFO] checking bczhc/rust against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbczhc%2Frust" "/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/bczhc/rust on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bczhc/rust
[INFO] finished tweaking git repo https://github.com/bczhc/rust
[INFO] tweaked toml for git repo https://github.com/bczhc/rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/bczhc/rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0bfbab061a26ec35f5ce32f1deb85799ecc4c1989410ee42d839fd3eab6f60cf
[INFO] running `Command { std: "docker" "start" "-a" "0bfbab061a26ec35f5ce32f1deb85799ecc4c1989410ee42d839fd3eab6f60cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bfbab061a26ec35f5ce32f1deb85799ecc4c1989410ee42d839fd3eab6f60cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bfbab061a26ec35f5ce32f1deb85799ecc4c1989410ee42d839fd3eab6f60cf", kill_on_drop: false }`
[INFO] [stdout] 0bfbab061a26ec35f5ce32f1deb85799ecc4c1989410ee42d839fd3eab6f60cf
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05a0f83a47199575856e469e55ac2652d0337a553df2e17ba71a457fef51e1f4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "05a0f83a47199575856e469e55ac2652d0337a553df2e17ba71a457fef51e1f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling magic-sys v0.2.1
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking lib v1.0.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking magic v0.12.2
[INFO] [stderr]     Checking character_statistics v1.0.0 (/opt/rustwide/workdir/apps/character_statistics)
[INFO] [stderr]     Checking reverse v1.0.0 (/opt/rustwide/workdir/apps/reverse)
[INFO] [stderr]     Checking rust v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking utf-converter v1.0.0 (/opt/rustwide/workdir/apps/utf-converter)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fourier_series_demo.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 19 |     let mut input = Vec::new();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fourier_series_demo.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 19 |     let mut input = Vec::new();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking default-file-mode v1.0.0 (/opt/rustwide/workdir/apps/default_file_mode)
[INFO] [stderr]     Checking shuffle_string v1.0.0 (/opt/rustwide/workdir/apps/shuffle_string)
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking size_format v1.0.2
[INFO] [stderr]     Checking file_size v1.0.0 (/opt/rustwide/workdir/apps/file_size)
[INFO] [stderr]     Checking stdin_size v1.0.0 (/opt/rustwide/workdir/apps/stdin_size)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.79s
[INFO] running `Command { std: "docker" "inspect" "05a0f83a47199575856e469e55ac2652d0337a553df2e17ba71a457fef51e1f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05a0f83a47199575856e469e55ac2652d0337a553df2e17ba71a457fef51e1f4", kill_on_drop: false }`
[INFO] [stdout] 05a0f83a47199575856e469e55ac2652d0337a553df2e17ba71a457fef51e1f4