[INFO] updating cached repository https://github.com/Tarnadas/wasm-bindgen-test
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 444880b737e5e100c264cff5d7ce24bf66282e81
[INFO] testing Tarnadas/wasm-bindgen-test against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FTarnadas%2Fwasm-bindgen-test" "work/builds/worker-8/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tarnadas/wasm-bindgen-test 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 git repo https://github.com/Tarnadas/wasm-bindgen-test
[INFO] finished tweaking git repo https://github.com/Tarnadas/wasm-bindgen-test
[INFO] tweaked toml for git repo https://github.com/Tarnadas/wasm-bindgen-test written to work/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Tarnadas/wasm-bindgen-test already has a lockfile, it will not be regenerated
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/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] e8647371e599461e4f71c7bffbb81812ba05d870be46f465963708bae2c44c43
[INFO] running `"docker" "start" "-a" "e8647371e599461e4f71c7bffbb81812ba05d870be46f465963708bae2c44c43"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.19
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen v0.2.19
[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-0.2.19/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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e8647371e599461e4f71c7bffbb81812ba05d870be46f465963708bae2c44c43"`
[INFO] running `"docker" "rm" "-f" "e8647371e599461e4f71c7bffbb81812ba05d870be46f465963708bae2c44c43"`
[INFO] [stdout] e8647371e599461e4f71c7bffbb81812ba05d870be46f465963708bae2c44c43