[INFO] updating cached repository https://github.com/nrc/clyde
[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] 35e1948e24facf67bf4d0bbb41223e83b502a9c4
[INFO] testing nrc/clyde against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrc%2Fclyde" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nrc/clyde 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/nrc/clyde
[INFO] finished tweaking git repo https://github.com/nrc/clyde
[INFO] tweaked toml for git repo https://github.com/nrc/clyde written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/nrc/clyde 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/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] 96f26805fe9270b354040dc5d7a26152c1cbe0b15bcd440292d824cb3b7b0aeb
[INFO] running `"docker" "start" "-a" "96f26805fe9270b354040dc5d7a26152c1cbe0b15bcd440292d824cb3b7b0aeb"`
[INFO] [stderr]    Compiling syn v0.15.40
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling json v0.11.13
[INFO] [stderr]    Compiling rls-span v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling fst v0.3.3
[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/rls-span-0.5.2/src/lib.rs:1:34
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "nightly", feature(step_trait))]
[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 `rls-span`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "96f26805fe9270b354040dc5d7a26152c1cbe0b15bcd440292d824cb3b7b0aeb"`
[INFO] running `"docker" "rm" "-f" "96f26805fe9270b354040dc5d7a26152c1cbe0b15bcd440292d824cb3b7b0aeb"`
[INFO] [stdout] 96f26805fe9270b354040dc5d7a26152c1cbe0b15bcd440292d824cb3b7b0aeb