[INFO] cloning repository https://github.com/azukifuku/rust-lesson
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/azukifuku/rust-lesson" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazukifuku%2Frust-lesson", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazukifuku%2Frust-lesson'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 377e05a820bebb97175f32fc74caf23e767c1e2f
[INFO] testing azukifuku/rust-lesson against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fazukifuku%2Frust-lesson" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/azukifuku/rust-lesson on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/azukifuku/rust-lesson
[INFO] finished tweaking git repo https://github.com/azukifuku/rust-lesson
[INFO] tweaked toml for git repo https://github.com/azukifuku/rust-lesson written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate git repo https://github.com/azukifuku/rust-lesson already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42657e011b5a45a3439fcf8ebd98d3a7689893be961aa20aa47ab812c5813af6
[INFO] running `Command { std: "docker" "start" "-a" "42657e011b5a45a3439fcf8ebd98d3a7689893be961aa20aa47ab812c5813af6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42657e011b5a45a3439fcf8ebd98d3a7689893be961aa20aa47ab812c5813af6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42657e011b5a45a3439fcf8ebd98d3a7689893be961aa20aa47ab812c5813af6", kill_on_drop: false }`
[INFO] [stdout] 42657e011b5a45a3439fcf8ebd98d3a7689893be961aa20aa47ab812c5813af6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c73dd57ed3a8a4cd13ccf516c75077318dc3171a3c5ee957bbbf771a64f225f9
[INFO] running `Command { std: "docker" "start" "-a" "c73dd57ed3a8a4cd13ccf516c75077318dc3171a3c5ee957bbbf771a64f225f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lesson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     x = 6;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/main.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:40:16
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "c73dd57ed3a8a4cd13ccf516c75077318dc3171a3c5ee957bbbf771a64f225f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c73dd57ed3a8a4cd13ccf516c75077318dc3171a3c5ee957bbbf771a64f225f9", kill_on_drop: false }`
[INFO] [stdout] c73dd57ed3a8a4cd13ccf516c75077318dc3171a3c5ee957bbbf771a64f225f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b22593bc297b6debade41d140474006ab242b18b651c0d20dcb85a32fe5ad70
[INFO] running `Command { std: "docker" "start" "-a" "1b22593bc297b6debade41d140474006ab242b18b651c0d20dcb85a32fe5ad70", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-lesson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     x = 6;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/main.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:40:16
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (x, y, z) = t1;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.25s
[INFO] running `Command { std: "docker" "inspect" "1b22593bc297b6debade41d140474006ab242b18b651c0d20dcb85a32fe5ad70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b22593bc297b6debade41d140474006ab242b18b651c0d20dcb85a32fe5ad70", kill_on_drop: false }`
[INFO] [stdout] 1b22593bc297b6debade41d140474006ab242b18b651c0d20dcb85a32fe5ad70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e3a49be91eefc11e8a52d1492e0ef355f03a4ff6dcfdb8a4c54f36ac23b1dafb
[INFO] running `Command { std: "docker" "start" "-a" "e3a49be91eefc11e8a52d1492e0ef355f03a4ff6dcfdb8a4c54f36ac23b1dafb", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     x = 6;
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:40:10
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let (x, y, z) = t1;
[INFO] [stderr]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/main.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let (x, y, z) = t1;
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:40:16
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let (x, y, z) = t1;
[INFO] [stderr]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-lesson` (bin "rust-lesson" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_lesson-55e828c148ce5787)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e3a49be91eefc11e8a52d1492e0ef355f03a4ff6dcfdb8a4c54f36ac23b1dafb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3a49be91eefc11e8a52d1492e0ef355f03a4ff6dcfdb8a4c54f36ac23b1dafb", kill_on_drop: false }`
[INFO] [stdout] e3a49be91eefc11e8a52d1492e0ef355f03a4ff6dcfdb8a4c54f36ac23b1dafb