[INFO] fetching crate yaiouom 0.1.3...
[INFO] testing yaiouom-0.1.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate yaiouom 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate yaiouom 0.1.3 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 yaiouom 0.1.3
[INFO] finished tweaking crates.io crate yaiouom 0.1.3
[INFO] tweaked toml for crates.io crate yaiouom 0.1.3 written to /workspace/builds/worker-6/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] f41d63f9751ec77861a7eb08156cfd6a2f9ae70665c8ae3b84baa9558a50a5a0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f41d63f9751ec77861a7eb08156cfd6a2f9ae70665c8ae3b84baa9558a50a5a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f41d63f9751ec77861a7eb08156cfd6a2f9ae70665c8ae3b84baa9558a50a5a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f41d63f9751ec77861a7eb08156cfd6a2f9ae70665c8ae3b84baa9558a50a5a0", kill_on_drop: false }`
[INFO] [stdout] f41d63f9751ec77861a7eb08156cfd6a2f9ae70665c8ae3b84baa9558a50a5a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 77b5e9607edded2c8479a4e349b3a5c8cd058a446e9e80da0428e5b1f8ece82e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "77b5e9607edded2c8479a4e349b3a5c8cd058a446e9e80da0428e5b1f8ece82e", 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]    Compiling yaiouom v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> src/unit.rs:65:3
[INFO] [stdout]    |
[INFO] [stdout] 65 | #[rustc_yaiouom_check_unify_measure]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> src/unit.rs:156:7
[INFO] [stdout]     |
[INFO] [stdout] 156 |     #[rustc_yaiouom_check_unify]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> src/unit.rs:518:3
[INFO] [stdout]     |
[INFO] [stdout] 518 | #[rustc_yaiouom_combinator_dimensionless]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> src/unit.rs:548:3
[INFO] [stdout]     |
[INFO] [stdout] 548 | #[rustc_yaiouom_combinator_mul]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]    --> src/unit.rs:569:3
[INFO] [stdout]     |
[INFO] [stdout] 569 | #[rustc_yaiouom_combinator_inv]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_yaiouom_check_unify_measure` in this scope
[INFO] [stdout]   --> src/unit.rs:65:3
[INFO] [stdout]    |
[INFO] [stdout] 65 | #[rustc_yaiouom_check_unify_measure]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_yaiouom_check_unify` in this scope
[INFO] [stdout]    --> src/unit.rs:156:7
[INFO] [stdout]     |
[INFO] [stdout] 156 |     #[rustc_yaiouom_check_unify]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_yaiouom_combinator_dimensionless` in this scope
[INFO] [stdout]    --> src/unit.rs:518:3
[INFO] [stdout]     |
[INFO] [stdout] 518 | #[rustc_yaiouom_combinator_dimensionless]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_yaiouom_combinator_mul` in this scope
[INFO] [stdout]    --> src/unit.rs:548:3
[INFO] [stdout]     |
[INFO] [stdout] 548 | #[rustc_yaiouom_combinator_mul]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_yaiouom_combinator_inv` in this scope
[INFO] [stdout]    --> src/unit.rs:569:3
[INFO] [stdout]     |
[INFO] [stdout] 569 | #[rustc_yaiouom_combinator_inv]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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(rustc_attrs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yaiouom` due to 12 previous errors
[INFO] running `Command { std: "docker" "inspect" "77b5e9607edded2c8479a4e349b3a5c8cd058a446e9e80da0428e5b1f8ece82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b5e9607edded2c8479a4e349b3a5c8cd058a446e9e80da0428e5b1f8ece82e", kill_on_drop: false }`
[INFO] [stdout] 77b5e9607edded2c8479a4e349b3a5c8cd058a446e9e80da0428e5b1f8ece82e