[INFO] fetching crate netxserver 1.5.2...
[INFO] checking netxserver-1.5.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate netxserver 1.5.2 into /workspace/builds/worker-92/source
[INFO] validating manifest of crates.io crate netxserver 1.5.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate netxserver 1.5.2
[INFO] finished tweaking crates.io crate netxserver 1.5.2
[INFO] tweaked toml for crates.io crate netxserver 1.5.2 written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] crate crates.io crate netxserver 1.5.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-openssl v0.6.2
[INFO] [stderr]   Downloaded proc_macro_roids v0.7.0
[INFO] [stderr]   Downloaded rmp-serde v0.15.5
[INFO] [stderr]   Downloaded mimalloc v0.1.26
[INFO] [stderr]   Downloaded tcpserver v1.5.0
[INFO] [stderr]   Downloaded data-rw v1.5.3
[INFO] [stderr]   Downloaded netxbuilder v1.2.0
[INFO] [stderr]   Downloaded aqueue v1.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f520971f8b7c41287cca8eb8086d22bba81fabb78f82121619231c0ba2db0850
[INFO] running `Command { std: "docker" "start" "-a" "f520971f8b7c41287cca8eb8086d22bba81fabb78f82121619231c0ba2db0850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f520971f8b7c41287cca8eb8086d22bba81fabb78f82121619231c0ba2db0850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f520971f8b7c41287cca8eb8086d22bba81fabb78f82121619231c0ba2db0850", kill_on_drop: false }`
[INFO] [stdout] f520971f8b7c41287cca8eb8086d22bba81fabb78f82121619231c0ba2db0850
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad581719605f5e0688c71a6c6a64c706ed72c3d19a497fc741d11f740cd00a8e
[INFO] running `Command { std: "docker" "start" "-a" "ad581719605f5e0688c71a6c6a64c706ed72c3d19a497fc741d11f740cd00a8e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]    Compiling tokio v1.8.1
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking futures-micro v0.5.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking rmp v0.8.10
[INFO] [stderr]     Checking async-oneshot v0.5.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling libmimalloc-sys v0.1.22
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking mimalloc v0.1.26
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling proc_macro_roids v0.7.0
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling auto_impl v0.4.1
[INFO] [stderr]    Compiling netxbuilder v1.2.0
[INFO] [stderr]     Checking aqueue v1.1.3
[INFO] [stderr]     Checking tcpserver v1.5.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tcpserver-1.5.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[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 `tcpserver` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ad581719605f5e0688c71a6c6a64c706ed72c3d19a497fc741d11f740cd00a8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad581719605f5e0688c71a6c6a64c706ed72c3d19a497fc741d11f740cd00a8e", kill_on_drop: false }`
[INFO] [stdout] ad581719605f5e0688c71a6c6a64c706ed72c3d19a497fc741d11f740cd00a8e
