[INFO] fetching crate tcpserver 1.5.2...
[INFO] checking tcpserver-1.5.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate tcpserver 1.5.2 into /workspace/builds/worker-117/source
[INFO] validating manifest of crates.io crate tcpserver 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 tcpserver 1.5.2
[INFO] finished tweaking crates.io crate tcpserver 1.5.2
[INFO] tweaked toml for crates.io crate tcpserver 1.5.2 written to /workspace/builds/worker-117/source/Cargo.toml
[INFO] crate crates.io crate tcpserver 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 futures-executor v0.3.15
[INFO] [stderr]   Downloaded anyhow v1.0.41
[INFO] [stderr]   Downloaded tokio-openssl v0.6.1
[INFO] [stderr]   Downloaded syn v1.0.73
[INFO] [stderr]   Downloaded instant v0.1.9
[INFO] [stderr]   Downloaded proc-macro2 v1.0.27
[INFO] [stderr]   Downloaded futures-macro v0.3.15
[INFO] [stderr]   Downloaded env_logger v0.8.4
[INFO] [stderr]   Downloaded humantime v2.1.0
[INFO] [stderr]   Downloaded async-oneshot v0.5.0
[INFO] [stderr]   Downloaded winapi-util v0.1.5
[INFO] [stderr]   Downloaded termcolor v1.1.2
[INFO] [stderr]   Downloaded futures-channel v0.3.15
[INFO] [stderr]   Downloaded pin-project-lite v0.2.6
[INFO] [stderr]   Downloaded slab v0.4.3
[INFO] [stderr]   Downloaded futures-core v0.3.15
[INFO] [stderr]   Downloaded cc v1.0.68
[INFO] [stderr]   Downloaded redox_syscall v0.2.9
[INFO] [stderr]   Downloaded futures v0.3.15
[INFO] [stderr]   Downloaded futures-micro v0.5.0
[INFO] [stderr]   Downloaded async-trait v0.1.50
[INFO] [stderr]   Downloaded futures-io v0.3.15
[INFO] [stderr]   Downloaded futures-sink v0.3.15
[INFO] [stderr]   Downloaded tokio-macros v1.2.0
[INFO] [stderr]   Downloaded futures-util v0.3.15
[INFO] [stderr]   Downloaded openssl v0.10.34
[INFO] [stderr]   Downloaded vcpkg v0.2.14
[INFO] [stderr]   Downloaded tokio v1.7.0
[INFO] [stderr]   Downloaded libc v0.2.97
[INFO] [stderr]   Downloaded pkg-config v0.3.19
[INFO] [stderr]   Downloaded aqueue v1.1.3
[INFO] [stderr]   Downloaded tcpclient v1.2.2
[INFO] [stderr]   Downloaded futures-task v0.3.15
[INFO] [stderr]   Downloaded bytes v1.0.1
[INFO] [stderr]   Downloaded openssl-sys v0.9.63
[INFO] [stderr]   Downloaded pin-project-internal v1.0.7
[INFO] [stderr]   Downloaded pin-project v1.0.7
[INFO] [stderr]   Downloaded hermit-abi v0.1.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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] 14737588c3e31f20eb19cf0e89f16075593fb3e9d86cf9b22eb127079bee5f24
[INFO] running `Command { std: "docker" "start" "-a" "14737588c3e31f20eb19cf0e89f16075593fb3e9d86cf9b22eb127079bee5f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14737588c3e31f20eb19cf0e89f16075593fb3e9d86cf9b22eb127079bee5f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14737588c3e31f20eb19cf0e89f16075593fb3e9d86cf9b22eb127079bee5f24", kill_on_drop: false }`
[INFO] [stdout] 14737588c3e31f20eb19cf0e89f16075593fb3e9d86cf9b22eb127079bee5f24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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] de732ae8bfd5a1ab89cb2a8f8966e435933dc0598a3bcfcf0304b4f90cbbc6e2
[INFO] running `Command { std: "docker" "start" "-a" "de732ae8bfd5a1ab89cb2a8f8966e435933dc0598a3bcfcf0304b4f90cbbc6e2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking futures-micro v0.5.0
[INFO] [stderr]    Compiling tokio v1.7.0
[INFO] [stderr]     Checking async-oneshot v0.5.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking aqueue v1.1.3
[INFO] [stderr]     Checking regex v1.5.4
[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 atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking tcpclient v1.2.2
[INFO] [stderr]     Checking tcpserver v1.5.2 (/opt/rustwide/workdir)
[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/tcpclient-1.2.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> 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] [stderr] error: could not compile `tcpclient` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "de732ae8bfd5a1ab89cb2a8f8966e435933dc0598a3bcfcf0304b4f90cbbc6e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de732ae8bfd5a1ab89cb2a8f8966e435933dc0598a3bcfcf0304b4f90cbbc6e2", kill_on_drop: false }`
[INFO] [stdout] de732ae8bfd5a1ab89cb2a8f8966e435933dc0598a3bcfcf0304b4f90cbbc6e2
