[INFO] fetching crate muta-apm 0.1.0-alpha.15...
[INFO] checking muta-apm-0.1.0-alpha.15 against beta for pr-78714
[INFO] extracting crate muta-apm 0.1.0-alpha.15 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate muta-apm 0.1.0-alpha.15 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 muta-apm 0.1.0-alpha.15
[INFO] finished tweaking crates.io crate muta-apm 0.1.0-alpha.15
[INFO] tweaked toml for crates.io crate muta-apm 0.1.0-alpha.15 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate muta-apm 0.1.0-alpha.15 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-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] 2b48a86dacdb9ed7c5a61b1a280bd90070493b3a9da4d38dc43d85af71443ca7
[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" "2b48a86dacdb9ed7c5a61b1a280bd90070493b3a9da4d38dc43d85af71443ca7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b48a86dacdb9ed7c5a61b1a280bd90070493b3a9da4d38dc43d85af71443ca7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b48a86dacdb9ed7c5a61b1a280bd90070493b3a9da4d38dc43d85af71443ca7", kill_on_drop: false }`
[INFO] [stdout] 2b48a86dacdb9ed7c5a61b1a280bd90070493b3a9da4d38dc43d85af71443ca7
[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] b53dba2dabe0ce549cd3b08425511e37ba9775a428c9e0bfc148b3d4c62ff552
[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" "b53dba2dabe0ce549cd3b08425511e37ba9775a428c9e0bfc148b3d4c62ff552", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.21
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking object v0.19.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]     Checking dyn-clone v1.0.1
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking addr2line v0.12.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling quote v1.0.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking creep v0.2.2
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking rlp v0.4.5
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libmath v0.1.4
[INFO] [stderr]     Checking prime_tools v0.2.2
[INFO] [stderr]     Checking backtrace v0.3.47
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling pin-project-internal v0.4.16
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling derive_more v0.99.5
[INFO] [stderr]    Compiling async-trait v0.1.31
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]     Checking thrift_codec v0.1.1
[INFO] [stderr]     Checking rustracing v0.4.0
[INFO] [stderr]     Checking rustracing_jaeger v0.4.1
[INFO] [stderr]     Checking pin-project v0.4.16
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking tokio v0.2.20
[INFO] [stderr]     Checking moodyblues-sdk v0.3.0
[INFO] [stderr]     Checking overlord v0.2.0-alpha.13
[INFO] [stderr]    Compiling muta-apm-derive v0.1.0-alpha.12
[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/overlord-0.2.0-alpha.13/src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![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 `overlord`
[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" "b53dba2dabe0ce549cd3b08425511e37ba9775a428c9e0bfc148b3d4c62ff552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b53dba2dabe0ce549cd3b08425511e37ba9775a428c9e0bfc148b3d4c62ff552", kill_on_drop: false }`
[INFO] [stdout] b53dba2dabe0ce549cd3b08425511e37ba9775a428c9e0bfc148b3d4c62ff552