[INFO] updating cached repository https://github.com/vks/discrete-log
[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] 163c06cd56ce5fae39f4d2329425eb1e4f1752c4
[INFO] checking vks/discrete-log against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvks%2Fdiscrete-log" "/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/vks/discrete-log 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/vks/discrete-log
[INFO] finished tweaking git repo https://github.com/vks/discrete-log
[INFO] tweaked toml for git repo https://github.com/vks/discrete-log written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/vks/discrete-log 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 66b456bb7296884518ef2e15cf4afc6a1893c8a23cba751e3ef22f73233cfc74
[INFO] running `"docker" "start" "-a" "66b456bb7296884518ef2e15cf4afc6a1893c8a23cba751e3ef22f73233cfc74"`
[INFO] [stderr]    Compiling getrandom v0.1.11
[INFO] [stderr]    Compiling rustc-cfg v0.2.0
[INFO] [stderr]    Compiling rug v1.5.2
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking num-bigint v0.2.2
[INFO] [stderr]     Checking rust-gmp v0.5.0
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_os v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.3.1
[INFO] [stderr]    Compiling ramp v0.5.2
[INFO] [stderr]     Checking criterion v0.3.0
[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/ramp-0.5.2/src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(core_intrinsics, asm, allocator_api)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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/ramp-0.5.2/src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![feature(step_trait, ptr_internals, raw_vec_internals)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `ramp`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "66b456bb7296884518ef2e15cf4afc6a1893c8a23cba751e3ef22f73233cfc74"`
[INFO] running `"docker" "rm" "-f" "66b456bb7296884518ef2e15cf4afc6a1893c8a23cba751e3ef22f73233cfc74"`
[INFO] [stdout] 66b456bb7296884518ef2e15cf4afc6a1893c8a23cba751e3ef22f73233cfc74