[INFO] cloning repository https://github.com/averycrespi/yolk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/averycrespi/yolk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faverycrespi%2Fyolk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faverycrespi%2Fyolk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 452988af6352b0a8b3c628218f639064888dd699
[INFO] checking averycrespi/yolk against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faverycrespi%2Fyolk" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/averycrespi/yolk 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 git repo https://github.com/averycrespi/yolk
[INFO] finished tweaking git repo https://github.com/averycrespi/yolk
[INFO] tweaked toml for git repo https://github.com/averycrespi/yolk written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/averycrespi/yolk already has a lockfile, it will not be regenerated
[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-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 56872e3f8426557ca126e336073db8c9cad1790d4e2d1a279b88f6e5d9ebfe3a
[INFO] running `Command { std: "docker" "start" "-a" "56872e3f8426557ca126e336073db8c9cad1790d4e2d1a279b88f6e5d9ebfe3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56872e3f8426557ca126e336073db8c9cad1790d4e2d1a279b88f6e5d9ebfe3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56872e3f8426557ca126e336073db8c9cad1790d4e2d1a279b88f6e5d9ebfe3a", kill_on_drop: false }`
[INFO] [stdout] 56872e3f8426557ca126e336073db8c9cad1790d4e2d1a279b88f6e5d9ebfe3a
[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=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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 33e5c5e480fe797d9a4e1b0e3af5b1c491e0f2981d69aa3b3429986d9c241fd9
[INFO] running `Command { std: "docker" "start" "-a" "33e5c5e480fe797d9a4e1b0e3af5b1c491e0f2981d69aa3b3429986d9c241fd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking yolol_number v0.7.0
[INFO] [stderr]     Checking yolol_number v0.6.2
[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/yolol_number-0.7.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![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/yolol_number-0.6.2/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(trait_alias)]
[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 `yolol_number`
[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
[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" "33e5c5e480fe797d9a4e1b0e3af5b1c491e0f2981d69aa3b3429986d9c241fd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33e5c5e480fe797d9a4e1b0e3af5b1c491e0f2981d69aa3b3429986d9c241fd9", kill_on_drop: false }`
[INFO] [stdout] 33e5c5e480fe797d9a4e1b0e3af5b1c491e0f2981d69aa3b3429986d9c241fd9