[INFO] crate ratman 0.1.0 is already in cache
[INFO] testing ratman-0.1.0 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate ratman 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ratman 0.1.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "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-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddcf30be7879adfcfcc364530001c0cb1c20e4a0f9f5a7a2dd416fe1776de15b
[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" "ddcf30be7879adfcfcc364530001c0cb1c20e4a0f9f5a7a2dd416fe1776de15b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddcf30be7879adfcfcc364530001c0cb1c20e4a0f9f5a7a2dd416fe1776de15b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddcf30be7879adfcfcc364530001c0cb1c20e4a0f9f5a7a2dd416fe1776de15b", kill_on_drop: false }`
[INFO] [stdout] ddcf30be7879adfcfcc364530001c0cb1c20e4a0f9f5a7a2dd416fe1776de15b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41913bb7b3bccc77975054e471ec8f1addd1c842d89b30e3316e1b9ce174ae22
[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" "41913bb7b3bccc77975054e471ec8f1addd1c842d89b30e3316e1b9ce174ae22", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling wasm-bindgen v0.2.67
[INFO] [stderr]    Compiling parking v1.0.6
[INFO] [stderr]    Compiling event-listener v2.3.3
[INFO] [stderr]    Compiling heapless v0.5.5
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling send_wrapper v0.4.0
[INFO] [stderr]    Compiling postcard-cobs v0.1.5-pre
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling twox-hash v1.5.0
[INFO] [stderr]    Compiling as-slice v0.1.3
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling futures-lite v0.1.10
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling async-channel v1.4.0
[INFO] [stderr]    Compiling ratman-identity v0.3.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling blocking v0.4.7
[INFO] [stderr]    Compiling postcard v0.4.3
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]    Compiling conjoiner-engine v1.2.3
[INFO] [stderr]    Compiling ratman-netmod v0.3.0
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]    Compiling smol v0.1.18
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling js-sys v0.3.44
[INFO] [stderr]    Compiling web-sys v0.3.44
[INFO] [stderr]    Compiling gloo-timers v0.2.1
[INFO] [stderr]    Compiling futures-timer v3.0.2
[INFO] [stderr]    Compiling async-std v1.6.2
[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] running `Command { std: "docker" "inspect" "41913bb7b3bccc77975054e471ec8f1addd1c842d89b30e3316e1b9ce174ae22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41913bb7b3bccc77975054e471ec8f1addd1c842d89b30e3316e1b9ce174ae22", kill_on_drop: false }`
[INFO] [stdout] 41913bb7b3bccc77975054e471ec8f1addd1c842d89b30e3316e1b9ce174ae22