[INFO] cloning repository https://github.com/crumblingstatue/cowbump
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crumblingstatue/cowbump" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08c0662e435d3a4725aff5e454cf0bc601f3403d
[INFO] testing crumblingstatue/cowbump against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crumblingstatue/cowbump on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crumblingstatue/cowbump
[INFO] finished tweaking git repo https://github.com/crumblingstatue/cowbump
[INFO] tweaked toml for git repo https://github.com/crumblingstatue/cowbump written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/crumblingstatue/cowbump already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/jeremyletang/rust-sfml.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86acdcde70aa2d549e84557e4fc52919db7e667baee55418198dfbfd22a6be70
[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" "86acdcde70aa2d549e84557e4fc52919db7e667baee55418198dfbfd22a6be70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86acdcde70aa2d549e84557e4fc52919db7e667baee55418198dfbfd22a6be70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86acdcde70aa2d549e84557e4fc52919db7e667baee55418198dfbfd22a6be70", kill_on_drop: false }`
[INFO] [stdout] 86acdcde70aa2d549e84557e4fc52919db7e667baee55418198dfbfd22a6be70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e381b0568d87aaf328c097314ed0ace3d11dae0752108aecd95f5b065668278
[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" "6e381b0568d87aaf328c097314ed0ace3d11dae0752108aecd95f5b065668278", kill_on_drop: false }`
[INFO] [stderr]    Compiling sfml-build v0.3.0 (https://github.com/jeremyletang/rust-sfml.git#15fa1b27)
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling weezl v0.1.3
[INFO] [stderr]    Compiling smallvec v1.5.0
[INFO] [stderr]    Compiling widestring v0.4.3
[INFO] [stderr]    Compiling addr2line v0.14.0
[INFO] [stderr]    Compiling xcb v0.9.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling bincode v1.3.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.0
[INFO] [stderr]    Compiling csfml-system-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#15fa1b27)
[INFO] [stderr]    Compiling csfml-window-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#15fa1b27)
[INFO] [stderr]    Compiling csfml-graphics-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#15fa1b27)
[INFO] [stderr]    Compiling ropey v1.2.0
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling gif v0.11.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling sfml v0.15.1 (https://github.com/jeremyletang/rust-sfml.git#15fa1b27)
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling tiff v0.6.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling image v0.23.12
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stderr]    Compiling arboard v1.0.2
[INFO] [stderr]    Compiling cowbump v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[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 `cowbump`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6e381b0568d87aaf328c097314ed0ace3d11dae0752108aecd95f5b065668278", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e381b0568d87aaf328c097314ed0ace3d11dae0752108aecd95f5b065668278", kill_on_drop: false }`
[INFO] [stdout] 6e381b0568d87aaf328c097314ed0ace3d11dae0752108aecd95f5b065668278