[INFO] updating cached repository https://github.com/martskins/tide-workshop
[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] 52f557c169d20c9c81502a7303548dfbfd5facbf
[INFO] checking martskins/tide-workshop against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartskins%2Ftide-workshop" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/martskins/tide-workshop 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/martskins/tide-workshop
[INFO] finished tweaking git repo https://github.com/martskins/tide-workshop
[INFO] tweaked toml for git repo https://github.com/martskins/tide-workshop written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/martskins/tide-workshop 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] f680ca75b0fbbf544131f035179fbcfdfe856e76fad6b2d0e9d934badca3b2cb
[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" "f680ca75b0fbbf544131f035179fbcfdfe856e76fad6b2d0e9d934badca3b2cb"`
[INFO] [stderr]    Compiling syn v0.15.40
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking buf_redux v0.8.2
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.17
[INFO] [stderr]     Checking backtrace v0.3.33
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking regex v1.2.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking r2d2 v0.8.5
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking h2 v0.1.25
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking http-service v0.2.0 (https://github.com/rustasync/http-service#736be519)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/http-service-1c19c79b6bb4664f/736be51/src/lib.rs:58:1
[INFO] [stderr]    |
[INFO] [stderr] 58 | #![feature(async_await, arbitrary_self_types)]
[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 `http-service`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f680ca75b0fbbf544131f035179fbcfdfe856e76fad6b2d0e9d934badca3b2cb"`
[INFO] running `"docker" "rm" "-f" "f680ca75b0fbbf544131f035179fbcfdfe856e76fad6b2d0e9d934badca3b2cb"`
[INFO] [stdout] f680ca75b0fbbf544131f035179fbcfdfe856e76fad6b2d0e9d934badca3b2cb