[INFO] updating cached repository https://github.com/tomc1998/rs-proc-gen-experiment
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] cda6dfbc593366a9f339dbaa9ca484f8d97326d2
[INFO] checking tomc1998/rs-proc-gen-experiment against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Frs-proc-gen-experiment" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomc1998/rs-proc-gen-experiment 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/tomc1998/rs-proc-gen-experiment
[INFO] finished tweaking git repo https://github.com/tomc1998/rs-proc-gen-experiment
[INFO] tweaked toml for git repo https://github.com/tomc1998/rs-proc-gen-experiment written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/tomc1998/rs-proc-gen-experiment 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 6cae95e5a15e81b067e95792dfadb8710d750de028e3cc4e1a494ee591334320
[INFO] running `"docker" "start" "-a" "6cae95e5a15e81b067e95792dfadb8710d750de028e3cc4e1a494ee591334320"`
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling x11-dl v2.18.1
[INFO] [stderr]    Compiling wayland-scanner v0.20.10
[INFO] [stderr]     Checking smallvec v0.6.3
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking approx v0.2.0
[INFO] [stderr]    Compiling shred-derive v0.5.0
[INFO] [stderr]    Compiling glutin v0.16.0
[INFO] [stderr]     Checking ordered-float v0.5.0
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking serde_yaml v0.7.5
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking wayland-sys v0.20.10
[INFO] [stderr]     Checking wayland-commons v0.20.10
[INFO] [stderr]     Checking rusttype v0.6.2
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking rayon-core v1.4.0
[INFO] [stderr]    Compiling wayland-client v0.20.10
[INFO] [stderr]    Compiling wayland-protocols v0.20.10
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]     Checking shrev v1.0.1
[INFO] [stderr]     Checking shred v0.7.0
[INFO] [stderr]     Checking hibitset v0.5.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking specs v0.12.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.2.4
[INFO] [stderr]     Checking winit v0.15.1
[INFO] [stderr]     Checking gfx_window_glutin v0.24.0
[INFO] [stderr]     Checking proc-gen-experiment v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[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 `proc-gen-experiment`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `proc-gen-experiment`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6cae95e5a15e81b067e95792dfadb8710d750de028e3cc4e1a494ee591334320"`
[INFO] running `"docker" "rm" "-f" "6cae95e5a15e81b067e95792dfadb8710d750de028e3cc4e1a494ee591334320"`
[INFO] [stdout] 6cae95e5a15e81b067e95792dfadb8710d750de028e3cc4e1a494ee591334320