[INFO] fetching crate dns-client 0.0.2...
[INFO] checking dns-client-0.0.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate dns-client 0.0.2 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate dns-client 0.0.2 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 dns-client 0.0.2
[INFO] finished tweaking crates.io crate dns-client 0.0.2
[INFO] tweaked toml for crates.io crate dns-client 0.0.2 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] crate crates.io crate dns-client 0.0.2 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 thiserror-impl v1.0.10
[INFO] [stderr]   Downloaded thiserror v1.0.10
[INFO] [stderr]   Downloaded async-std v1.4.0
[INFO] [stderr]   Downloaded dnssector v0.2.0
[INFO] [stderr]   Downloaded dnsclient v0.1.7
[INFO] [stderr]   Downloaded async-task v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] f5b5a3a6ecd045ed73f39b8505ccd41dd9dac17e849e6797af46308ba636079d
[INFO] running `Command { std: "docker" "start" "-a" "f5b5a3a6ecd045ed73f39b8505ccd41dd9dac17e849e6797af46308ba636079d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5b5a3a6ecd045ed73f39b8505ccd41dd9dac17e849e6797af46308ba636079d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5b5a3a6ecd045ed73f39b8505ccd41dd9dac17e849e6797af46308ba636079d", kill_on_drop: false }`
[INFO] [stdout] f5b5a3a6ecd045ed73f39b8505ccd41dd9dac17e849e6797af46308ba636079d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] 9fb4d01caf1e9e3fe660f7d92f6f3717283770738e55d74027fdf111e218eb22
[INFO] running `Command { std: "docker" "start" "-a" "9fb4d01caf1e9e3fe660f7d92f6f3717283770738e55d74027fdf111e218eb22", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking debug-builders v0.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling debugtrace v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking either v0.1.7
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking async-task v1.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking async-std v1.4.0
[INFO] [stderr]     Checking backtrace v0.1.8
[INFO] [stderr]     Checking chomp v0.3.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.10
[INFO] [stderr]     Checking thiserror v1.0.10
[INFO] [stderr]     Checking dnssector v0.2.0
[INFO] [stderr]     Checking dnsclient v0.1.7
[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/dnsclient-0.1.7/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dnsclient` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9fb4d01caf1e9e3fe660f7d92f6f3717283770738e55d74027fdf111e218eb22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fb4d01caf1e9e3fe660f7d92f6f3717283770738e55d74027fdf111e218eb22", kill_on_drop: false }`
[INFO] [stdout] 9fb4d01caf1e9e3fe660f7d92f6f3717283770738e55d74027fdf111e218eb22
