[INFO] crate ubiquity 0.1.5 is already in cache
[INFO] testing ubiquity-0.1.5 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate ubiquity 0.1.5 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate ubiquity 0.1.5 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ubiquity 0.1.5
[INFO] finished tweaking crates.io crate ubiquity 0.1.5
[INFO] tweaked toml for crates.io crate ubiquity 0.1.5 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] c8965b62e92d848c2469afac82610977dc74d8b91f6578cd618c5b349bb2fe36
[INFO] running `"docker" "start" "-a" "c8965b62e92d848c2469afac82610977dc74d8b91f6578cd618c5b349bb2fe36"`
[INFO] [stderr]    Compiling typenum v1.3.2
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling walkdir v0.1.8
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling serde_codegen v0.8.23
[INFO] [stderr]    Compiling bincode v0.6.1
[INFO] [stderr]    Compiling generic-array v0.5.1
[INFO] [stderr]    Compiling serde_derive v0.8.23
[INFO] [stderr]    Compiling ubiquity v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:61:1
[INFO] [stderr]    |
[INFO] [stderr] 61 | #![feature(question_mark)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | #![feature(rustc_macro)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | #![feature(structural_match)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | #![feature(rustc_attrs)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `ubiquity`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c8965b62e92d848c2469afac82610977dc74d8b91f6578cd618c5b349bb2fe36"`
[INFO] running `"docker" "rm" "-f" "c8965b62e92d848c2469afac82610977dc74d8b91f6578cd618c5b349bb2fe36"`
[INFO] [stdout] c8965b62e92d848c2469afac82610977dc74d8b91f6578cd618c5b349bb2fe36