[INFO] fetching crate sfw-tools 0.4.0...
[INFO] testing sfw-tools-0.4.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sfw-tools 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate sfw-tools 0.4.0 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] removed /workspace/builds/worker-7/source/rust-toolchain
[INFO] started tweaking crates.io crate sfw-tools 0.4.0
[INFO] finished tweaking crates.io crate sfw-tools 0.4.0
[INFO] tweaked toml for crates.io crate sfw-tools 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate sfw-tools 0.4.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded cargo-husky v1.5.0
[INFO] [stderr]   Downloaded seahorse v1.1.1
[INFO] [stderr]   Downloaded fp-core v0.1.9
[INFO] [stderr]   Downloaded tailcall-impl v0.1.6
[INFO] [stderr]   Downloaded syn v1.0.68
[INFO] [stderr]   Downloaded tailcall v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 6a4173a4aa7aa9912a411bd9610a05711abcc5873ae4f8118b793dbc12cb0ff0
[INFO] running `Command { std: "docker" "start" "-a" "6a4173a4aa7aa9912a411bd9610a05711abcc5873ae4f8118b793dbc12cb0ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a4173a4aa7aa9912a411bd9610a05711abcc5873ae4f8118b793dbc12cb0ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a4173a4aa7aa9912a411bd9610a05711abcc5873ae4f8118b793dbc12cb0ff0", kill_on_drop: false }`
[INFO] [stdout] 6a4173a4aa7aa9912a411bd9610a05711abcc5873ae4f8118b793dbc12cb0ff0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3fb617b71433d23c59935c2491d775c29ab4c0f2059a72090f6024418d7c683
[INFO] running `Command { std: "docker" "start" "-a" "a3fb617b71433d23c59935c2491d775c29ab4c0f2059a72090f6024418d7c683", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling seahorse v1.1.1
[INFO] [stderr]    Compiling fp-core v0.1.9
[INFO] [stderr]    Compiling tailcall-impl v0.1.6
[INFO] [stderr]    Compiling tailcall v0.1.6
[INFO] [stderr]    Compiling sfw-tools v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::option::NoneError`
[INFO] [stdout]  --> src/error.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::option::NoneError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ no `NoneError` in `option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:204:1
[INFO] [stdout]     |
[INFO] [stdout] 204 | #![feature(try_trait)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sfw-tools` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "a3fb617b71433d23c59935c2491d775c29ab4c0f2059a72090f6024418d7c683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3fb617b71433d23c59935c2491d775c29ab4c0f2059a72090f6024418d7c683", kill_on_drop: false }`
[INFO] [stdout] a3fb617b71433d23c59935c2491d775c29ab4c0f2059a72090f6024418d7c683