[INFO] cloning repository https://github.com/takumak/mps2_an521_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/takumak/mps2_an521_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumak%2Fmps2_an521_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumak%2Fmps2_an521_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 476a5c67dd93e5ba1b9b5753e3aa404d8ca86272
[INFO] testing takumak/mps2_an521_rs against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftakumak%2Fmps2_an521_rs" "/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/takumak/mps2_an521_rs on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/takumak/mps2_an521_rs
[INFO] finished tweaking git repo https://github.com/takumak/mps2_an521_rs
[INFO] tweaked toml for git repo https://github.com/takumak/mps2_an521_rs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/takumak/mps2_an521_rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3dbe99363d1bef98ef2c56b6772955182b4001bc9f7776b01a0381275e7898e
[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" "a3dbe99363d1bef98ef2c56b6772955182b4001bc9f7776b01a0381275e7898e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3dbe99363d1bef98ef2c56b6772955182b4001bc9f7776b01a0381275e7898e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3dbe99363d1bef98ef2c56b6772955182b4001bc9f7776b01a0381275e7898e", kill_on_drop: false }`
[INFO] [stdout] a3dbe99363d1bef98ef2c56b6772955182b4001bc9f7776b01a0381275e7898e
[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=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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 5899c5c6720bec802130f35bef11e5e4cc6e8b0c753f60d7ca1455d048961675
[INFO] running `Command { std: "docker" "start" "-a" "5899c5c6720bec802130f35bef11e5e4cc6e8b0c753f60d7ca1455d048961675", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitfield v0.1.0 (/opt/rustwide/workdir/libs/bitfield)
[INFO] [stderr]    Compiling stpack v0.1.0 (/opt/rustwide/workdir/libs/stpack)
[INFO] [stderr]    Compiling linked_list_allocator v0.1.0 (/opt/rustwide/workdir/libs/linked_list_allocator)
[INFO] [stderr]    Compiling mmio v0.1.0 (/opt/rustwide/workdir/libs/mmio)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> libs/linked_list_allocator/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(no_coverage)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling kallsyms_dec v0.1.0 (/opt/rustwide/workdir/libs/kallsyms_dec)
[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 `linked_list_allocator` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5899c5c6720bec802130f35bef11e5e4cc6e8b0c753f60d7ca1455d048961675", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5899c5c6720bec802130f35bef11e5e4cc6e8b0c753f60d7ca1455d048961675", kill_on_drop: false }`
[INFO] [stdout] 5899c5c6720bec802130f35bef11e5e4cc6e8b0c753f60d7ca1455d048961675