[INFO] fetching crate dokkoo 0.3.0...
[INFO] checking dokkoo-0.3.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate dokkoo 0.3.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate dokkoo 0.3.0 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 dokkoo 0.3.0
[INFO] finished tweaking crates.io crate dokkoo 0.3.0
[INFO] tweaked toml for crates.io crate dokkoo 0.3.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate dokkoo 0.3.0 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
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[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stopwatch v0.0.7
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[INFO] [stderr]   Downloaded actix-tls v3.0.0-beta.4
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[INFO] [stderr]   Downloaded ahash v0.7.2
[INFO] [stderr]   Downloaded actix-web v4.0.0-beta.4
[INFO] [stderr]   Downloaded deunicode v1.1.1
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[INFO] [stderr]   Downloaded actix-files v0.6.0-beta.3
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[INFO] [stderr]   Downloaded liquid-derive v0.22.0
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[INFO] [stderr]   Downloaded kstring v1.0.1
[INFO] [stderr]   Downloaded pure-rust-locales v0.5.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] e6d911b9902ca0da2aed2d3016c57f98a2b286c65c407a2983626c17c3f7eebc
[INFO] running `Command { std: "docker" "start" "-a" "e6d911b9902ca0da2aed2d3016c57f98a2b286c65c407a2983626c17c3f7eebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6d911b9902ca0da2aed2d3016c57f98a2b286c65c407a2983626c17c3f7eebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6d911b9902ca0da2aed2d3016c57f98a2b286c65c407a2983626c17c3f7eebc", kill_on_drop: false }`
[INFO] [stdout] e6d911b9902ca0da2aed2d3016c57f98a2b286c65c407a2983626c17c3f7eebc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] cccb48599a1616e18c9066dc65b7eef85e90af6c1e1d11c732ba8d4ddffe177d
[INFO] running `Command { std: "docker" "start" "-a" "cccb48599a1616e18c9066dc65b7eef85e90af6c1e1d11c732ba8d4ddffe177d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stderr]    Compiling futures-macro v0.3.13
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[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
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[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking actix-utils v3.0.0-beta.2
[INFO] [stderr]     Checking actix-server v2.0.0-beta.3
[INFO] [stderr]     Checking clap v3.0.0-beta.2
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[INFO] [stderr]     Checking actix-tls v3.0.0-beta.4
[INFO] [stderr]     Checking h2 v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.13
[INFO] [stderr]     Checking futures v0.3.13
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking kstring v1.0.1
[INFO] [stderr]     Checking actix-router v0.2.7
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking liquid-core v0.22.0
[INFO] [stderr]     Checking actix-http v3.0.0-beta.4
[INFO] [stderr]     Checking liquid-lib v0.22.0
[INFO] [stderr]     Checking liquid v0.22.0
[INFO] [stderr]     Checking awc v3.0.0-beta.3
[INFO] [stderr]     Checking actix-web v4.0.0-beta.4
[INFO] [stderr]     Checking actix-files v0.6.0-beta.3
[INFO] [stderr]     Checking dokkoo v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(panic_info_message)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(panic_info_message)]
[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] [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 `dokkoo` 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" "cccb48599a1616e18c9066dc65b7eef85e90af6c1e1d11c732ba8d4ddffe177d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cccb48599a1616e18c9066dc65b7eef85e90af6c1e1d11c732ba8d4ddffe177d", kill_on_drop: false }`
[INFO] [stdout] cccb48599a1616e18c9066dc65b7eef85e90af6c1e1d11c732ba8d4ddffe177d
