[INFO] cloning repository https://github.com/Nirusu99/practice-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nirusu99/practice-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNirusu99%2Fpractice-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNirusu99%2Fpractice-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a1dbe254ab0c9a1af165772ebc7d6d715382807
[INFO] testing Nirusu99/practice-rs 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%2FNirusu99%2Fpractice-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/Nirusu99/practice-rs 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/Nirusu99/practice-rs
[INFO] finished tweaking git repo https://github.com/Nirusu99/practice-rs
[INFO] tweaked toml for git repo https://github.com/Nirusu99/practice-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Nirusu99/practice-rs 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 96ffc7cb2475de98cb174287311d40cd7ae42974ca94c292631514965d0b06b0
[INFO] running `Command { std: "docker" "start" "-a" "96ffc7cb2475de98cb174287311d40cd7ae42974ca94c292631514965d0b06b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96ffc7cb2475de98cb174287311d40cd7ae42974ca94c292631514965d0b06b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96ffc7cb2475de98cb174287311d40cd7ae42974ca94c292631514965d0b06b0", kill_on_drop: false }`
[INFO] [stdout] 96ffc7cb2475de98cb174287311d40cd7ae42974ca94c292631514965d0b06b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 129ee96259ee0fd49659b5fa340e17dd02a47d192a1b5db546a71538ab3e452a
[INFO] running `Command { std: "docker" "start" "-a" "129ee96259ee0fd49659b5fa340e17dd02a47d192a1b5db546a71538ab3e452a", kill_on_drop: false }`
[INFO] [stderr]    Compiling problem-b v0.1.0 (/opt/rustwide/workdir/problem-b)
[INFO] [stderr]    Compiling problem-k v0.1.0 (/opt/rustwide/workdir/problem-k)
[INFO] [stderr]    Compiling problem-d v0.1.0 (/opt/rustwide/workdir/problem-d)
[INFO] [stderr]    Compiling problem-c v0.1.0 (/opt/rustwide/workdir/problem-c)
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling pbr v1.0.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling generate_test v0.1.0 (/opt/rustwide/workdir/generate_test)
[INFO] [stderr]    Compiling analysis-rs v0.1.0 (/opt/rustwide/workdir/analysis-rs)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> analysis-rs/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_intersperse)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `analysis-rs` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "129ee96259ee0fd49659b5fa340e17dd02a47d192a1b5db546a71538ab3e452a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "129ee96259ee0fd49659b5fa340e17dd02a47d192a1b5db546a71538ab3e452a", kill_on_drop: false }`
[INFO] [stdout] 129ee96259ee0fd49659b5fa340e17dd02a47d192a1b5db546a71538ab3e452a