[INFO] fetching crate com_logger 0.1.0...
[INFO] checking com_logger-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate com_logger 0.1.0 into /workspace/builds/worker-30/source
[INFO] validating manifest of crates.io crate com_logger 0.1.0 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 com_logger 0.1.0
[INFO] finished tweaking crates.io crate com_logger 0.1.0
[INFO] tweaked toml for crates.io crate com_logger 0.1.0 written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 x86_64 v0.14.6
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded uart_16550 v0.2.15
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] 2b122fce6fc6f6b49e14d6c7479755d237e948ddab7ccd7d8de5ae5d2fe32b34
[INFO] running `Command { std: "docker" "start" "-a" "2b122fce6fc6f6b49e14d6c7479755d237e948ddab7ccd7d8de5ae5d2fe32b34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b122fce6fc6f6b49e14d6c7479755d237e948ddab7ccd7d8de5ae5d2fe32b34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b122fce6fc6f6b49e14d6c7479755d237e948ddab7ccd7d8de5ae5d2fe32b34", kill_on_drop: false }`
[INFO] [stdout] 2b122fce6fc6f6b49e14d6c7479755d237e948ddab7ccd7d8de5ae5d2fe32b34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] 0e4938858e5e2eeebcbbe6ea3b9fa62a3381860fa37ba71c342a77a839f3bedf
[INFO] running `Command { std: "docker" "start" "-a" "0e4938858e5e2eeebcbbe6ea3b9fa62a3381860fa37ba71c342a77a839f3bedf", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.14.6
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking volatile v0.4.4
[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/x86_64-0.14.6/src/lib.rs:9:37
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![cfg_attr(feature = "inline_asm", feature(asm))]
[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 `x86_64` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "0e4938858e5e2eeebcbbe6ea3b9fa62a3381860fa37ba71c342a77a839f3bedf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e4938858e5e2eeebcbbe6ea3b9fa62a3381860fa37ba71c342a77a839f3bedf", kill_on_drop: false }`
[INFO] [stdout] 0e4938858e5e2eeebcbbe6ea3b9fa62a3381860fa37ba71c342a77a839f3bedf
