[INFO] fetching crate grdf 0.2.1-beta...
[INFO] testing grdf-0.2.1-beta against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate grdf 0.2.1-beta into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate grdf 0.2.1-beta on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate grdf 0.2.1-beta
[INFO] finished tweaking crates.io crate grdf 0.2.1-beta
[INFO] tweaked toml for crates.io crate grdf 0.2.1-beta written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pct-str v1.1.0
[INFO] [stderr]   Downloaded iref v1.4.3
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "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] 99f0225908af64959fa40da4b1fdf51999c7f0e2a81e687ab2a3021ebf438c0f
[INFO] running `Command { std: "docker" "start" "-a" "99f0225908af64959fa40da4b1fdf51999c7f0e2a81e687ab2a3021ebf438c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99f0225908af64959fa40da4b1fdf51999c7f0e2a81e687ab2a3021ebf438c0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99f0225908af64959fa40da4b1fdf51999c7f0e2a81e687ab2a3021ebf438c0f", kill_on_drop: false }`
[INFO] [stdout] 99f0225908af64959fa40da4b1fdf51999c7f0e2a81e687ab2a3021ebf438c0f
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62bf3024138799d137c9fc2dd7b319db8f8da8e4c458fa76ce81bbed3e24e8de
[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" "62bf3024138799d137c9fc2dd7b319db8f8da8e4c458fa76ce81bbed3e24e8de", kill_on_drop: false }`
[INFO] [stderr]    Compiling pct-str v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling iref v1.4.3
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling grdf v0.2.1-beta (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:96:1
[INFO] [stdout]    |
[INFO] [stdout] 96 | #![feature(generic_associated_types)]
[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 `grdf` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "62bf3024138799d137c9fc2dd7b319db8f8da8e4c458fa76ce81bbed3e24e8de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62bf3024138799d137c9fc2dd7b319db8f8da8e4c458fa76ce81bbed3e24e8de", kill_on_drop: false }`
[INFO] [stdout] 62bf3024138799d137c9fc2dd7b319db8f8da8e4c458fa76ce81bbed3e24e8de