[INFO] cloning repository https://github.com/uzkbwza/rust-rl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uzkbwza/rust-rl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuzkbwza%2Frust-rl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuzkbwza%2Frust-rl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ed7841e5ff0c8ca108c0e36a0c165c607e640fe
[INFO] testing uzkbwza/rust-rl against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuzkbwza%2Frust-rl" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/uzkbwza/rust-rl on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/uzkbwza/rust-rl
[INFO] removed path dependency mapgen from git repo https://github.com/uzkbwza/rust-rl
[INFO] removed path dependency vecmap from git repo https://github.com/uzkbwza/rust-rl
[INFO] finished tweaking git repo https://github.com/uzkbwza/rust-rl
[INFO] tweaked toml for git repo https://github.com/uzkbwza/rust-rl written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/thebracket/rltk_rs`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (mapgen) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (vecmap) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] e4e1d0d2af377106884e21b45f480581bf80566f3a89c0507e6a7ce1d4fb878b
[INFO] running `Command { std: "docker" "start" "-a" "e4e1d0d2af377106884e21b45f480581bf80566f3a89c0507e6a7ce1d4fb878b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4e1d0d2af377106884e21b45f480581bf80566f3a89c0507e6a7ce1d4fb878b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4e1d0d2af377106884e21b45f480581bf80566f3a89c0507e6a7ce1d4fb878b", kill_on_drop: false }`
[INFO] [stdout] e4e1d0d2af377106884e21b45f480581bf80566f3a89c0507e6a7ce1d4fb878b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9b4826d729cda29abe81c7335264060cd36baf20c34eb69a946b50872c0404d
[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" "b9b4826d729cda29abe81c7335264060cd36baf20c34eb69a946b50872c0404d", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (mapgen) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (vecmap) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling winit v0.23.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling mopa v0.2.2
[INFO] [stderr]    Compiling atom v0.3.6
[INFO] [stderr]    Compiling bitflags v0.1.1
[INFO] [stderr]    Compiling tuple_utils v0.3.0
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling shrev v1.1.1
[INFO] [stderr]    Compiling vecmap v0.1.0
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling wayland-sys v0.28.3
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling nom v6.0.1
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling safe_arch v0.5.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling tcod-sys v5.0.1
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling dlib v0.4.2
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling andrew v0.3.1
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling wayland-sys v0.20.12
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling wayland-scanner v0.28.3
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling wide v0.5.5
[INFO] [stderr]    Compiling wayland-scanner v0.20.12
[INFO] [stderr]    Compiling gl_generator v0.6.1
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling wayland-commons v0.20.12
[INFO] [stderr]    Compiling sha2 v0.9.2
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling memmap2 v0.1.0
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.5
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]    Compiling glow v0.4.0
[INFO] [stderr]    Compiling image v0.22.5
[INFO] [stderr]    Compiling wayland-client v0.28.3
[INFO] [stderr]    Compiling wayland-protocols v0.28.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling image v0.23.12
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling gl v0.6.5
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling glutin v0.17.0
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling ultraviolet v0.7.5
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling xcursor v0.3.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling bracket-color v0.8.1 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling const-random v0.1.13
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling object-pool v0.5.3
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling wayland-commons v0.28.3
[INFO] [stderr]    Compiling calloop v0.6.5
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling bracket-geometry v0.8.1 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling rand v0.8.1
[INFO] [stderr]    Compiling ahash v0.2.19
[INFO] [stderr]    Compiling bracket-algorithm-traits v0.8.1 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling tcod v0.15.0
[INFO] [stderr]    Compiling bracket-pathfinding v0.8.1 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling bracket-random v0.8.0 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling mapgen v0.4.1
[INFO] [stderr]    Compiling bracket-noise v0.8.1 (https://github.com/thebracket/rltk_rs#cc23bdba)
[INFO] [stderr]    Compiling hibitset v0.6.3
[INFO] [stderr]    Compiling wayland-cursor v0.28.3
[INFO] [stderr]    Compiling wayland-egl v0.28.3
[INFO] [stderr]    Compiling smithay-client-toolkit v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling shred-derive v0.6.3
[INFO] [stderr]    Compiling specs-derive v0.4.1
[INFO] [stderr]    Compiling uni-gl v0.1.2
[INFO] [stderr]    Compiling shred v0.9.4
[INFO] [stderr]    Compiling winit v0.16.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/shred-0.9.4/src/lib.rs:54:34
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![cfg_attr(feature = "nightly", feature(core_intrinsics))]
[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 `shred`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b9b4826d729cda29abe81c7335264060cd36baf20c34eb69a946b50872c0404d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9b4826d729cda29abe81c7335264060cd36baf20c34eb69a946b50872c0404d", kill_on_drop: false }`
[INFO] [stdout] b9b4826d729cda29abe81c7335264060cd36baf20c34eb69a946b50872c0404d