[INFO] fetching crate savannah 0.1.0...
[INFO] testing savannah-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate savannah 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate savannah 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate savannah 0.1.0
[INFO] finished tweaking crates.io crate savannah 0.1.0
[INFO] tweaked toml for crates.io crate savannah 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63ac8aa6520f4f3248f75faa9214635a24b8e15ddaf225465fb6b2e85d82c661
[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" "63ac8aa6520f4f3248f75faa9214635a24b8e15ddaf225465fb6b2e85d82c661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63ac8aa6520f4f3248f75faa9214635a24b8e15ddaf225465fb6b2e85d82c661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63ac8aa6520f4f3248f75faa9214635a24b8e15ddaf225465fb6b2e85d82c661", kill_on_drop: false }`
[INFO] [stdout] 63ac8aa6520f4f3248f75faa9214635a24b8e15ddaf225465fb6b2e85d82c661
[INFO] running `Command { std: "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" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79bb5c425e1457e0ebc16eebd9f46cbffa080a72a906bfa8fe2a413cfc6e157f
[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" "79bb5c425e1457e0ebc16eebd9f46cbffa080a72a906bfa8fe2a413cfc6e157f", kill_on_drop: false }`
[INFO] [stderr]    Compiling malloc_buf v0.0.6
[INFO] [stderr]    Compiling objc v0.2.7
[INFO] [stderr]    Compiling savannah v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/version.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 | /         {
[INFO] [stdout] 77 | |             #[cfg(target_os = "macos")]
[INFO] [stdout] 78 | |                 {
[INFO] [stdout] 79 | |                     Os::macOS
[INFO] [stdout] ...  |
[INFO] [stdout] 84 | |                 }
[INFO] [stdout] 85 | |         },
[INFO] [stdout]    | |_________^ expected enum `Os`, found `()`
[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 `savannah`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "79bb5c425e1457e0ebc16eebd9f46cbffa080a72a906bfa8fe2a413cfc6e157f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79bb5c425e1457e0ebc16eebd9f46cbffa080a72a906bfa8fe2a413cfc6e157f", kill_on_drop: false }`
[INFO] [stdout] 79bb5c425e1457e0ebc16eebd9f46cbffa080a72a906bfa8fe2a413cfc6e157f