[INFO] cloning repository https://github.com/emilio/searchfox-rustc-analyser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emilio/searchfox-rustc-analyser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fsearchfox-rustc-analyser"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fsearchfox-rustc-analyser'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 053686ff21cebf591dfe106d1d7c9f9bf3b04c93
[INFO] checking emilio/searchfox-rustc-analyser against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femilio%2Fsearchfox-rustc-analyser" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emilio/searchfox-rustc-analyser on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/emilio/searchfox-rustc-analyser
[INFO] finished tweaking git repo https://github.com/emilio/searchfox-rustc-analyser
[INFO] tweaked toml for git repo https://github.com/emilio/searchfox-rustc-analyser written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/emilio/searchfox-rustc-analyser already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 69b78850346b413641fd93d28e6e9149fa077fb2ff969be8e1b781a8665076dd
[INFO] running `"docker" "start" "-a" "69b78850346b413641fd93d28e6e9149fa077fb2ff969be8e1b781a8665076dd"`
[INFO] [stderr]     Checking serde v1.0.20
[INFO] [stderr]     Checking rls-span v0.4.0
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]    Compiling derive-new v0.5.0
[INFO] [stderr]     Checking clap v2.27.1
[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/rls-span-0.4.0/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(proc_macro)]
[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" "69b78850346b413641fd93d28e6e9149fa077fb2ff969be8e1b781a8665076dd"`
[INFO] running `"docker" "rm" "-f" "69b78850346b413641fd93d28e6e9149fa077fb2ff969be8e1b781a8665076dd"`
[INFO] [stdout] 69b78850346b413641fd93d28e6e9149fa077fb2ff969be8e1b781a8665076dd