[INFO] fetching crate r-graph 0.1.5...
[INFO] checking r-graph-0.1.5 against beta for pr-78714
[INFO] extracting crate r-graph 0.1.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate r-graph 0.1.5 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate r-graph 0.1.5
[INFO] finished tweaking crates.io crate r-graph 0.1.5
[INFO] tweaked toml for crates.io crate r-graph 0.1.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6835af0f1c961e5e622085282ab779bc0d035da19ac291114ba884395272a73
[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" "c6835af0f1c961e5e622085282ab779bc0d035da19ac291114ba884395272a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6835af0f1c961e5e622085282ab779bc0d035da19ac291114ba884395272a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6835af0f1c961e5e622085282ab779bc0d035da19ac291114ba884395272a73", kill_on_drop: false }`
[INFO] [stdout] c6835af0f1c961e5e622085282ab779bc0d035da19ac291114ba884395272a73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31a4deadc1881b1d406471d05068d6992b715220cbe0340c5bbf4f46c009e4f7
[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" "31a4deadc1881b1d406471d05068d6992b715220cbe0340c5bbf4f46c009e4f7", kill_on_drop: false }`
[INFO] [stderr]     Checking r-graph v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddEdge`, `Undirected`
[INFO] [stdout]  --> src/extended/clique.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation, Undirected};
[INFO] [stdout]   |                               ^^^^^^^               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddVertex`, `GetVertex`, `Vertices`
[INFO] [stdout]  --> src/extended/clique.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::dev::{AddVertex, GetVertex, Neighbours, Vertices, orientation};
[INFO] [stdout]   |                  ^^^^^^^^^  ^^^^^^^^^              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SubGraph`
[INFO] [stdout]  --> src/extended/clique.rs:5:41
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::wrapper::sub::{intersection, SubGraph};
[INFO] [stdout]   |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::dev::transform::transformers::VertexKey`
[INFO] [stdout]   --> src/extended/clique.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::dev::transform::transformers::VertexKey;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Orientation`
[INFO] [stdout]  --> src/wrapper/sub.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation};
[INFO] [stdout]   |                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddEdge`, `Undirected`
[INFO] [stdout]  --> src/extended/clique.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation, Undirected};
[INFO] [stdout]   |                               ^^^^^^^               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddVertex`, `GetVertex`, `Vertices`
[INFO] [stdout]  --> src/extended/clique.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::dev::{AddVertex, GetVertex, Neighbours, Vertices, orientation};
[INFO] [stdout]   |                  ^^^^^^^^^  ^^^^^^^^^              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SubGraph`
[INFO] [stdout]  --> src/extended/clique.rs:5:41
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::wrapper::sub::{intersection, SubGraph};
[INFO] [stdout]   |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::dev::transform::transformers::VertexKey`
[INFO] [stdout]   --> src/extended/clique.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::dev::transform::transformers::VertexKey;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Orientation`
[INFO] [stdout]  --> src/wrapper/sub.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation};
[INFO] [stdout]   |                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `r-graph`
[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] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "31a4deadc1881b1d406471d05068d6992b715220cbe0340c5bbf4f46c009e4f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31a4deadc1881b1d406471d05068d6992b715220cbe0340c5bbf4f46c009e4f7", kill_on_drop: false }`
[INFO] [stdout] 31a4deadc1881b1d406471d05068d6992b715220cbe0340c5bbf4f46c009e4f7