[INFO] updating cached repository https://github.com/aesir-vanir/tyr
[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] 2c46aa77affa69ad605ae2f19b87357b73c36723
[INFO] checking aesir-vanir/tyr against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faesir-vanir%2Ftyr" "/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/aesir-vanir/tyr 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/aesir-vanir/tyr
[INFO] finished tweaking git repo https://github.com/aesir-vanir/tyr
[INFO] tweaked toml for git repo https://github.com/aesir-vanir/tyr written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/aesir-vanir/tyr 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-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] d25bf9243b8823079ff90b2480c2d1d73555211bbf0324ab8fe095f5de7e8fef
[INFO] running `"docker" "start" "-a" "d25bf9243b8823079ff90b2480c2d1d73555211bbf0324ab8fe095f5de7e8fef"`
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling derive_builder v0.7.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.26
[INFO] [stderr]    Compiling mimir v0.3.5
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking Inflector v0.11.3
[INFO] [stderr]     Checking slog-try v0.2.0
[INFO] [stderr]     Checking backtrace v0.3.13
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]    Compiling getset v0.0.6
[INFO] [stderr]    Compiling darling_core v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling darling_macro v0.8.1
[INFO] [stderr]    Compiling darling v0.8.1
[INFO] [stderr]    Compiling derive_builder_core v0.4.0
[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/mimir-0.3.5/src/lib.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(ptr_internals, try_from, untagged_unions)]
[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 `mimir`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d25bf9243b8823079ff90b2480c2d1d73555211bbf0324ab8fe095f5de7e8fef"`
[INFO] running `"docker" "rm" "-f" "d25bf9243b8823079ff90b2480c2d1d73555211bbf0324ab8fe095f5de7e8fef"`
[INFO] [stdout] d25bf9243b8823079ff90b2480c2d1d73555211bbf0324ab8fe095f5de7e8fef