[INFO] updating cached repository https://github.com/JakubAdamWieczorek/sepultus
[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] 241cd8c76cc1f30c1e3bba3a5f323128ce9f6af5
[INFO] checking JakubAdamWieczorek/sepultus against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJakubAdamWieczorek%2Fsepultus" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JakubAdamWieczorek/sepultus 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/JakubAdamWieczorek/sepultus
[INFO] finished tweaking git repo https://github.com/JakubAdamWieczorek/sepultus
[INFO] tweaked toml for git repo https://github.com/JakubAdamWieczorek/sepultus written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/JakubAdamWieczorek/sepultus 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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 9f4e260e098d29c08b86663ab12b692546bae9972f99682b75be1b80e50f97b9
[INFO] running `"docker" "start" "-a" "9f4e260e098d29c08b86663ab12b692546bae9972f99682b75be1b80e50f97b9"`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]    Compiling isahc v0.7.4
[INFO] [stderr]     Checking reduce v0.1.2
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling curl-sys v0.4.23
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]    Compiling rstest v0.4.1
[INFO] [stderr]     Checking openssl-sys v0.9.52
[INFO] [stderr]     Checking libnghttp2-sys v0.1.2
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking libz-sys v1.0.25
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking buf_redux v0.6.3
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking backoff v0.1.5
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking postgres-protocol v0.5.0-alpha.1
[INFO] [stderr]     Checking rstar v0.2.0
[INFO] [stderr]     Checking multipart v0.13.6
[INFO] [stderr]     Checking sluice v0.4.2
[INFO] [stderr]     Checking openssl v0.10.25
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking iron v0.6.1
[INFO] [stderr]     Checking persistent v0.4.0
[INFO] [stderr]     Checking logger v0.4.0
[INFO] [stderr]     Checking router v0.6.0
[INFO] [stderr]     Checking console v0.9.0
[INFO] [stderr]     Checking console v0.8.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling futures-async-stream-macro v0.1.0-alpha.7
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking futures-async-stream v0.1.0-alpha.7
[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/futures-async-stream-0.1.0-alpha.7/src/lib.rs:217:1
[INFO] [stderr]     |
[INFO] [stderr] 217 | #![feature(gen_future, generator_trait)]
[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 `futures-async-stream`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9f4e260e098d29c08b86663ab12b692546bae9972f99682b75be1b80e50f97b9"`
[INFO] running `"docker" "rm" "-f" "9f4e260e098d29c08b86663ab12b692546bae9972f99682b75be1b80e50f97b9"`
[INFO] [stdout] 9f4e260e098d29c08b86663ab12b692546bae9972f99682b75be1b80e50f97b9