[INFO] fetching crate gridsim-ui 0.4.1...
[INFO] testing gridsim-ui-0.4.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate gridsim-ui 0.4.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate gridsim-ui 0.4.1 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 gridsim-ui 0.4.1
[INFO] finished tweaking crates.io crate gridsim-ui 0.4.1
[INFO] tweaked toml for crates.io crate gridsim-ui 0.4.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate gridsim-ui 0.4.1 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] [stderr]     Blocking waiting for file lock on package cache
[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] 4d45144c842e7bb608efbfc800ce409c3fe56d2a6b88676aee4eba8c3fb549d5
[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" "4d45144c842e7bb608efbfc800ce409c3fe56d2a6b88676aee4eba8c3fb549d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d45144c842e7bb608efbfc800ce409c3fe56d2a6b88676aee4eba8c3fb549d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d45144c842e7bb608efbfc800ce409c3fe56d2a6b88676aee4eba8c3fb549d5", kill_on_drop: false }`
[INFO] [stdout] 4d45144c842e7bb608efbfc800ce409c3fe56d2a6b88676aee4eba8c3fb549d5
[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] 0449b8aca893904762cf1bf1e227619e12f29c9e55f54124e8bd97e4eb17a0e2
[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" "0449b8aca893904762cf1bf1e227619e12f29c9e55f54124e8bd97e4eb17a0e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling downcast-rs v1.0.4
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling cgmath v0.17.0
[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stderr]    Compiling takeable-option v0.4.0
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling walkdir v2.2.8
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling stb_truetype v0.2.6
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.0.2
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling enum-iterator-derive v0.1.1
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling rusttype v0.7.7
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling x11-dl v2.18.3
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling andrew v0.2.1
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling wayland-sys v0.21.13
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling backtrace v0.3.33
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.3
[INFO] [stderr]    Compiling glium v0.25.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]    Compiling wayland-commons v0.21.13
[INFO] [stderr]    Compiling gridsim v0.3.2
[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/gridsim-0.3.2/src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(test)]
[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 `gridsim`
[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" "0449b8aca893904762cf1bf1e227619e12f29c9e55f54124e8bd97e4eb17a0e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0449b8aca893904762cf1bf1e227619e12f29c9e55f54124e8bd97e4eb17a0e2", kill_on_drop: false }`
[INFO] [stdout] 0449b8aca893904762cf1bf1e227619e12f29c9e55f54124e8bd97e4eb17a0e2