[INFO] fetching crate ratman 0.1.0...
[INFO] testing ratman-0.1.0 against 1.47.0 for beta-1.48-1
[INFO] extracting crate ratman 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate ratman 0.1.0 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ratman 0.1.0
[INFO] finished tweaking crates.io crate ratman 0.1.0
[INFO] tweaked toml for crates.io crate ratman 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d41a5da73a5974446df5dd92a891dd85ea5b8d26c88d30a9dd0bb36edbb1cb20
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d41a5da73a5974446df5dd92a891dd85ea5b8d26c88d30a9dd0bb36edbb1cb20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d41a5da73a5974446df5dd92a891dd85ea5b8d26c88d30a9dd0bb36edbb1cb20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d41a5da73a5974446df5dd92a891dd85ea5b8d26c88d30a9dd0bb36edbb1cb20", kill_on_drop: false }`
[INFO] [stdout] d41a5da73a5974446df5dd92a891dd85ea5b8d26c88d30a9dd0bb36edbb1cb20
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41229513d3af31f214c842f1592c0bf1db3e0ae34c88b403a0bc7252717b2ffc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "41229513d3af31f214c842f1592c0bf1db3e0ae34c88b403a0bc7252717b2ffc", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-io v0.3.6
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling async-task v4.0.2
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling futures-sink v0.3.6
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling postcard-cobs v0.1.5-pre
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling futures-task v0.3.6
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling futures-channel v0.3.6
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling futures-lite v1.11.1
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling twox-hash v1.6.0
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling polling v2.0.1
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-executor v1.3.0
[INFO] [stderr]    Compiling async-io v1.1.10
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling futures-util v0.3.6
[INFO] [stderr]    Compiling async-global-executor v1.3.0
[INFO] [stderr]    Compiling async-std v1.6.5
[INFO] [stderr]    Compiling ratman-identity v0.3.0
[INFO] [stderr]    Compiling futures-executor v0.3.6
[INFO] [stderr]    Compiling futures v0.3.6
[INFO] [stderr]    Compiling postcard v0.4.3
[INFO] [stderr]    Compiling conjoiner-engine v1.2.3
[INFO] [stderr]    Compiling ratman-netmod v0.3.0
[INFO] [stderr]    Compiling clockctrl v0.1.0
[INFO] [stderr]    Compiling ratman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/core/switch.rs:56:23
[INFO] [stdout]    |
[INFO] [stdout] 56 |             while let Some(i) = self.ctrl.1.recv().await {
[INFO] [stdout]    |                       ^^^^^^^   ------------------------ this expression has type `std::result::Result<usize, async_std::sync::RecvError>`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       expected enum `std::result::Result`, found enum `std::option::Option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `std::result::Result<usize, async_std::sync::RecvError>`
[INFO] [stdout]               found enum `std::option::Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ratman`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "41229513d3af31f214c842f1592c0bf1db3e0ae34c88b403a0bc7252717b2ffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41229513d3af31f214c842f1592c0bf1db3e0ae34c88b403a0bc7252717b2ffc", kill_on_drop: false }`
[INFO] [stdout] 41229513d3af31f214c842f1592c0bf1db3e0ae34c88b403a0bc7252717b2ffc
