[INFO] cloning repository https://github.com/iceshap7/rust-workshop-b2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iceshap7/rust-workshop-b2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeshap7%2Frust-workshop-b2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeshap7%2Frust-workshop-b2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5023e00d478c454ec843e3b058ec3abcbeb9c6ec
[INFO] testing iceshap7/rust-workshop-b2 against beta-2025-04-13 for beta-1.87-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ficeshap7%2Frust-workshop-b2" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iceshap7/rust-workshop-b2 on toolchain beta-2025-04-13
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-04-13" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iceshap7/rust-workshop-b2
[INFO] finished tweaking git repo https://github.com/iceshap7/rust-workshop-b2
[INFO] tweaked toml for git repo https://github.com/iceshap7/rust-workshop-b2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/iceshap7/rust-workshop-b2 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" "+beta-2025-04-13" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af0745d59c5ada950ec1068021c18a74b56cef363bd5e5149e4de14e907143ad
[INFO] running `Command { std: "docker" "start" "-a" "af0745d59c5ada950ec1068021c18a74b56cef363bd5e5149e4de14e907143ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af0745d59c5ada950ec1068021c18a74b56cef363bd5e5149e4de14e907143ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af0745d59c5ada950ec1068021c18a74b56cef363bd5e5149e4de14e907143ad", kill_on_drop: false }`
[INFO] [stdout] af0745d59c5ada950ec1068021c18a74b56cef363bd5e5149e4de14e907143ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30bc52116864fd8f6c2861b879b28567483f75da33aa72158c10a5cfa6ee4967
[INFO] running `Command { std: "docker" "start" "-a" "30bc52116864fd8f6c2861b879b28567483f75da33aa72158c10a5cfa6ee4967", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-workshop-b2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let  i = 0;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/main.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let c = 0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "30bc52116864fd8f6c2861b879b28567483f75da33aa72158c10a5cfa6ee4967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30bc52116864fd8f6c2861b879b28567483f75da33aa72158c10a5cfa6ee4967", kill_on_drop: false }`
[INFO] [stdout] 30bc52116864fd8f6c2861b879b28567483f75da33aa72158c10a5cfa6ee4967
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-04-13" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7b3cbaf51c2430138f354d88b17142550b39bd9b630983ee7092d408c206aae
[INFO] running `Command { std: "docker" "start" "-a" "b7b3cbaf51c2430138f354d88b17142550b39bd9b630983ee7092d408c206aae", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-workshop-b2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let  i = 0;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-b2` (bin "rust-workshop-b2" test); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/beta-2025-04-13-x86_64-unknown-linux-gnu/bin/rustc --crate-name rust_workshop_b2 --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=3f426abc9257f422 -C extra-filename=-3838282a72067b9f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b7b3cbaf51c2430138f354d88b17142550b39bd9b630983ee7092d408c206aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7b3cbaf51c2430138f354d88b17142550b39bd9b630983ee7092d408c206aae", kill_on_drop: false }`
[INFO] [stdout] b7b3cbaf51c2430138f354d88b17142550b39bd9b630983ee7092d408c206aae