[INFO] updating cached repository https://github.com/aQaTL/idsr
[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] 4c8eb691176ecc3c1cf34e3c18ecdbb3e76470c7
[INFO] checking aQaTL/idsr against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FaQaTL%2Fidsr" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aQaTL/idsr 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/aQaTL/idsr
[INFO] finished tweaking git repo https://github.com/aQaTL/idsr
[INFO] tweaked toml for git repo https://github.com/aQaTL/idsr written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/aQaTL/idsr 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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 4c9efafbd6591ee30e4854b6370fb13e9015f163ce1b34db2eaf155d6827cc28
[INFO] running `"docker" "start" "-a" "4c9efafbd6591ee30e4854b6370fb13e9015f163ce1b34db2eaf155d6827cc28"`
[INFO] [stderr]    Compiling winapi v0.3.6
[INFO] [stderr]     Checking arrayvec v0.4.8
[INFO] [stderr]    Compiling nuklear-sys v1.33.2
[INFO] [stderr]     Checking memchr v2.1.1
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.0.6
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking nuklear-rust v0.5.1
[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/nuklear-rust-0.5.1/src/lib.rs:8:41
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![cfg_attr(feature = "rust_allocator", feature(allocator_api, alloc))]
[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 `nuklear-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4c9efafbd6591ee30e4854b6370fb13e9015f163ce1b34db2eaf155d6827cc28"`
[INFO] running `"docker" "rm" "-f" "4c9efafbd6591ee30e4854b6370fb13e9015f163ce1b34db2eaf155d6827cc28"`
[INFO] [stdout] 4c9efafbd6591ee30e4854b6370fb13e9015f163ce1b34db2eaf155d6827cc28