[INFO] crate router-rs 0.2.1 is already in cache
[INFO] testing router-rs-0.2.1 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate router-rs 0.2.1 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate router-rs 0.2.1 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 router-rs 0.2.1
[INFO] finished tweaking crates.io crate router-rs 0.2.1
[INFO] tweaked toml for crates.io crate router-rs 0.2.1 written to work/builds/worker-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/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] 62973a00ce144aabf5f5498bf1c92050891c00c1ffd1e38125e676e9e9a63064
[INFO] running `"docker" "start" "-a" "62973a00ce144aabf5f5498bf1c92050891c00c1ffd1e38125e676e9e9a63064"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.51
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.51
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling html-validation v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling weedle v0.10.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.51
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.51
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.51
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling html-macro v0.1.6
[INFO] [stderr]    Compiling router-rs-macro v0.1.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wasm-bindgen-0.2.51/src/lib.rs:10:34
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![cfg_attr(feature = "nightly", feature(unsize))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `wasm-bindgen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "62973a00ce144aabf5f5498bf1c92050891c00c1ffd1e38125e676e9e9a63064"`
[INFO] running `"docker" "rm" "-f" "62973a00ce144aabf5f5498bf1c92050891c00c1ffd1e38125e676e9e9a63064"`
[INFO] [stdout] 62973a00ce144aabf5f5498bf1c92050891c00c1ffd1e38125e676e9e9a63064