[INFO] fetching crate ryb_game 0.2.24...
[INFO] testing ryb_game-0.2.24 against 1.49.0 for beta-1.50-1
[INFO] extracting crate ryb_game 0.2.24 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ryb_game 0.2.24 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 crates.io crate ryb_game 0.2.24
[INFO] finished tweaking crates.io crate ryb_game 0.2.24
[INFO] tweaked toml for crates.io crate ryb_game 0.2.24 written to /workspace/builds/worker-7/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] 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stdout] e798a99710106ce8a09379a19cf2b81f56456a7141797b6036c515e07f24cbe9
[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" "e798a99710106ce8a09379a19cf2b81f56456a7141797b6036c515e07f24cbe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e798a99710106ce8a09379a19cf2b81f56456a7141797b6036c515e07f24cbe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e798a99710106ce8a09379a19cf2b81f56456a7141797b6036c515e07f24cbe9", kill_on_drop: false }`
[INFO] [stdout] e798a99710106ce8a09379a19cf2b81f56456a7141797b6036c515e07f24cbe9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 0d4d2c6fd7fb390197d2fda8f4d4d5d5812ec64aaa6e94446d9b6e25ba5b2097
[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" "0d4d2c6fd7fb390197d2fda8f4d4d5d5812ec64aaa6e94446d9b6e25ba5b2097", kill_on_drop: false }`
[INFO] [stderr]    Compiling piston-float v0.3.0
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling shader_version v0.2.2
[INFO] [stderr]    Compiling bitflags v0.6.0
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling piston-texture v0.5.0
[INFO] [stderr]    Compiling interpolation v0.1.0
[INFO] [stderr]    Compiling read_color v0.1.0
[INFO] [stderr]    Compiling piston-shaders_graphics2d v0.3.1
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling gfx_gl v0.3.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling draw_state v0.6.0
[INFO] [stderr]    Compiling piston-viewport v0.3.0
[INFO] [stderr]    Compiling vecmath v0.3.1
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling pistoncore-input v0.17.1
[INFO] [stderr]    Compiling gfx_core v0.6.1
[INFO] [stderr]    Compiling piston2d-graphics v0.21.1
[INFO] [stderr]    Compiling gl_generator v0.6.1
[INFO] [stderr]    Compiling png v0.6.2
[INFO] [stderr]    Compiling image v0.12.4
[INFO] [stderr]    Compiling pistoncore-window v0.26.2
[INFO] [stderr]    Compiling pistoncore-event_loop v0.31.4
[INFO] [stderr]    Compiling gl v0.6.5
[INFO] [stderr]    Compiling piston v0.31.4
[INFO] [stderr]    Compiling gfx v0.14.1
[INFO] [stderr]    Compiling piston-gfx_texture v0.22.1
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.38.0
[INFO] [stderr]    Compiling gfx_device_gl v0.13.1
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.35.1
[INFO] [stderr]    Compiling piston2d-opengl_graphics v0.42.1
[INFO] [stderr]    Compiling piston_window v0.64.0
[INFO] [stderr]    Compiling ryb_game v0.2.24 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `alloc_system`
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate alloc_system;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ryb_game`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0d4d2c6fd7fb390197d2fda8f4d4d5d5812ec64aaa6e94446d9b6e25ba5b2097", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4d2c6fd7fb390197d2fda8f4d4d5d5812ec64aaa6e94446d9b6e25ba5b2097", kill_on_drop: false }`
[INFO] [stdout] 0d4d2c6fd7fb390197d2fda8f4d4d5d5812ec64aaa6e94446d9b6e25ba5b2097