[INFO] updating cached repository https://github.com/alanwilhelm/starling-genesis
[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] 39c845b4b014123b1473ee6bc3c5188953ade27e
[INFO] checking alanwilhelm/starling-genesis against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falanwilhelm%2Fstarling-genesis" "/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/alanwilhelm/starling-genesis 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/alanwilhelm/starling-genesis
[INFO] finished tweaking git repo https://github.com/alanwilhelm/starling-genesis
[INFO] tweaked toml for git repo https://github.com/alanwilhelm/starling-genesis written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/alanwilhelm/starling-genesis 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] 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] [stdout] d5418fcb97a7dbdfa7d259c761195bff1d5557f9b957ed33f90eb6d1cffe1934
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d5418fcb97a7dbdfa7d259c761195bff1d5557f9b957ed33f90eb6d1cffe1934"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking base-x v0.2.2
[INFO] [stderr]     Checking integer-encoding v1.0.5
[INFO] [stderr]     Checking reexport-proc-macro v1.0.2
[INFO] [stderr]     Checking serde v1.0.55
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling ncurses v5.91.0
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking generic-array v0.6.0
[INFO] [stderr]     Checking tiny-keccak v1.4.1
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]     Checking digest-buffer v0.2.0
[INFO] [stderr]     Checking digest v0.4.0
[INFO] [stderr]     Checking multibase v0.6.0
[INFO] [stderr]     Checking sha2 v0.4.2
[INFO] [stderr]     Checking easy-hash v0.1.0
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]    Compiling enum-map-derive v0.2.5
[INFO] [stderr]     Checking enum-map v0.2.29
[INFO] [stderr]     Checking multihash v0.7.0
[INFO] [stderr]     Checking cid v0.2.3
[INFO] [stderr]     Checking multiaddr v0.3.0
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]     Checking murmur v0.1.0 (https://github.com/alanwilhelm/murmur#26ad0148)
[INFO] [stderr]     Checking cursive v0.9.0-alpha.0 (https://github.com/gyscos/Cursive#4a3bbbb9)
[INFO] [stderr]     Checking starling 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(iterator_step_by)]
[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 `starling`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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(iterator_step_by)]
[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 `starling`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d5418fcb97a7dbdfa7d259c761195bff1d5557f9b957ed33f90eb6d1cffe1934"`
[INFO] running `"docker" "rm" "-f" "d5418fcb97a7dbdfa7d259c761195bff1d5557f9b957ed33f90eb6d1cffe1934"`
[INFO] [stdout] d5418fcb97a7dbdfa7d259c761195bff1d5557f9b957ed33f90eb6d1cffe1934