[INFO] fetching crate synco 0.0.0...
[INFO] checking synco-0.0.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate synco 0.0.0 into /workspace/builds/worker-39/source
[INFO] validating manifest of crates.io crate synco 0.0.0 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 synco 0.0.0
[INFO] finished tweaking crates.io crate synco 0.0.0
[INFO] tweaked toml for crates.io crate synco 0.0.0 written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate crates.io crate synco 0.0.0 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 hashbrown v0.7.2
[INFO] [stderr]   Downloaded mopa v0.2.2
[INFO] [stderr]   Downloaded anymap v0.12.1
[INFO] [stderr]   Downloaded shrev v1.1.1
[INFO] [stderr]   Downloaded specs v0.16.1
[INFO] [stderr]   Downloaded shred v0.10.2
[INFO] [stderr]   Downloaded tynm v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] b19c085c0e7b3d497c8257e928b97061cf587534e8e3fbcbcfdc19b26c17896c
[INFO] running `Command { std: "docker" "start" "-a" "b19c085c0e7b3d497c8257e928b97061cf587534e8e3fbcbcfdc19b26c17896c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b19c085c0e7b3d497c8257e928b97061cf587534e8e3fbcbcfdc19b26c17896c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b19c085c0e7b3d497c8257e928b97061cf587534e8e3fbcbcfdc19b26c17896c", kill_on_drop: false }`
[INFO] [stdout] b19c085c0e7b3d497c8257e928b97061cf587534e8e3fbcbcfdc19b26c17896c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] a25e320f7d87467cba04e13d4b87091bf5b510aff585102a2931d6711d7f02b4
[INFO] running `Command { std: "docker" "start" "-a" "a25e320f7d87467cba04e13d4b87091bf5b510aff585102a2931d6711d7f02b4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking bitflags v1.3.1
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking synco v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking clap v2.33.3
[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(
[INFO] [stdout] 2 | |     generic_associated_types,
[INFO] [stdout] 3 | |     maybe_uninit_ref,
[INFO] [stdout] 4 | |     maybe_uninit_extra,
[INFO] [stdout] ... |
[INFO] [stdout] 8 | |     fn_traits,
[INFO] [stdout] 9 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/entity.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/query.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cell::{UnsafeCell, Ref},
[INFO] [stdout]   |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/query.rs:156:20
[INFO] [stdout]     |
[INFO] [stdout] 156 |                 };);*
[INFO] [stdout]     |                    ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/query.rs:156:20
[INFO] [stdout]     |
[INFO] [stdout] 156 |                 };);*
[INFO] [stdout]     |                    ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `synco` due to 2 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a25e320f7d87467cba04e13d4b87091bf5b510aff585102a2931d6711d7f02b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a25e320f7d87467cba04e13d4b87091bf5b510aff585102a2931d6711d7f02b4", kill_on_drop: false }`
[INFO] [stdout] a25e320f7d87467cba04e13d4b87091bf5b510aff585102a2931d6711d7f02b4
