[INFO] cloning repository https://github.com/stevebob/platform-game-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevebob/platform-game-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Fplatform-game-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Fplatform-game-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b182295c312d212b39a6e090c3221e6364a0145a
[INFO] testing stevebob/platform-game-experiment against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Fplatform-game-experiment" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stevebob/platform-game-experiment 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/stevebob/platform-game-experiment
[INFO] finished tweaking git repo https://github.com/stevebob/platform-game-experiment
[INFO] tweaked toml for git repo https://github.com/stevebob/platform-game-experiment written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/stevebob/platform-game-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+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] 9e2896d7c72a1d10bfd04d69beeef82eb6bb65d66e2649a8fc078010bf29f9fd
[INFO] running `Command { std: "docker" "start" "-a" "9e2896d7c72a1d10bfd04d69beeef82eb6bb65d66e2649a8fc078010bf29f9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e2896d7c72a1d10bfd04d69beeef82eb6bb65d66e2649a8fc078010bf29f9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e2896d7c72a1d10bfd04d69beeef82eb6bb65d66e2649a8fc078010bf29f9fd", kill_on_drop: false }`
[INFO] [stdout] 9e2896d7c72a1d10bfd04d69beeef82eb6bb65d66e2649a8fc078010bf29f9fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe0f43704bfd8f6686d950123939fc48e166d1897871186df79db2db7d86db92
[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" "fe0f43704bfd8f6686d950123939fc48e166d1897871186df79db2db7d86db92", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling token_store v0.1.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling custom_derive v0.1.7
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling x11-dl v2.18.0
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling log v0.4.2
[INFO] [stderr]    Compiling newtype_derive v0.1.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling tempfile v3.0.2
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.15.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling wayland-window v0.13.3
[INFO] [stderr]    Compiling winit v0.13.1
[INFO] [stderr]    Compiling gfx_device_gl v0.15.3
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling best v0.6.0
[INFO] [stderr]    Compiling gfx_window_glutin v0.23.0
[INFO] [stderr]    Compiling platform-game-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nonzero)]
[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 `platform-game-experiment`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "fe0f43704bfd8f6686d950123939fc48e166d1897871186df79db2db7d86db92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe0f43704bfd8f6686d950123939fc48e166d1897871186df79db2db7d86db92", kill_on_drop: false }`
[INFO] [stdout] fe0f43704bfd8f6686d950123939fc48e166d1897871186df79db2db7d86db92