[INFO] fetching crate forceatlas2 0.4.0...
[INFO] testing forceatlas2-0.4.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate forceatlas2 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate forceatlas2 0.4.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate forceatlas2 0.4.0
[INFO] finished tweaking crates.io crate forceatlas2 0.4.0
[INFO] tweaked toml for crates.io crate forceatlas2 0.4.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate forceatlas2 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded alloc_counter v0.0.4
[INFO] [stderr]   Downloaded scanrs v0.2.1
[INFO] [stderr]   Downloaded nbody_barnes_hut v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06a8b99c04d48035b062f756c1baea3711337828dff8f92ac107f686748dce5b
[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" "06a8b99c04d48035b062f756c1baea3711337828dff8f92ac107f686748dce5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06a8b99c04d48035b062f756c1baea3711337828dff8f92ac107f686748dce5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a8b99c04d48035b062f756c1baea3711337828dff8f92ac107f686748dce5b", kill_on_drop: false }`
[INFO] [stdout] 06a8b99c04d48035b062f756c1baea3711337828dff8f92ac107f686748dce5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d773aa18af390f166b71f770c5c4507e5617a3a88854fac2c81d7f5d7111f32
[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" "8d773aa18af390f166b71f770c5c4507e5617a3a88854fac2c81d7f5d7111f32", kill_on_drop: false }`
[INFO] [stderr]    Compiling maths-traits v0.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maths-traits-0.2.1/src/lib.rs:317:1
[INFO] [stdout]     |
[INFO] [stdout] 317 | #![feature(trait_alias)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maths-traits-0.2.1/src/lib.rs:318:1
[INFO] [stdout]     |
[INFO] [stdout] 318 | #![feature(specialization)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maths-traits-0.2.1/src/lib.rs:319:1
[INFO] [stdout]     |
[INFO] [stdout] 319 | #![feature(extra_log_consts)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maths-traits` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "8d773aa18af390f166b71f770c5c4507e5617a3a88854fac2c81d7f5d7111f32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d773aa18af390f166b71f770c5c4507e5617a3a88854fac2c81d7f5d7111f32", kill_on_drop: false }`
[INFO] [stdout] 8d773aa18af390f166b71f770c5c4507e5617a3a88854fac2c81d7f5d7111f32
