[INFO] updating cached repository https://github.com/luxn/flut
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] 294d41a24ebe241bb75413f01d8c939f87aff1e0
[INFO] testing luxn/flut against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluxn%2Fflut" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luxn/flut on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/luxn/flut
[INFO] finished tweaking git repo https://github.com/luxn/flut
[INFO] tweaked toml for git repo https://github.com/luxn/flut written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/luxn/flut already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] d51a2756abcbd39c2acd7e1ffb7e04850f76ae489e4f2ea1ec377c780f85a352
[INFO] running `"docker" "start" "-a" "d51a2756abcbd39c2acd7e1ffb7e04850f76ae489e4f2ea1ec377c780f85a352"`
[INFO] [stderr]    Compiling serde_cbor v0.9.0
[INFO] [stderr]    Compiling serde_yaml v0.8.7
[INFO] [stderr]    Compiling syn v0.15.21
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling flut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:89:17
[INFO] [stderr]    |
[INFO] [stderr] 89 |             let mut socket = UdpSocket::bind(format!("127.0.0.1:{}", port)).expect("udp socket could not get created");
[INFO] [stderr]    |                 ----^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.56s
[INFO] running `"docker" "inspect" "d51a2756abcbd39c2acd7e1ffb7e04850f76ae489e4f2ea1ec377c780f85a352"`
[INFO] running `"docker" "rm" "-f" "d51a2756abcbd39c2acd7e1ffb7e04850f76ae489e4f2ea1ec377c780f85a352"`
[INFO] [stdout] d51a2756abcbd39c2acd7e1ffb7e04850f76ae489e4f2ea1ec377c780f85a352
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 258d50d0d02e76081e53f79061fc464153ee14262490421834aa9de9c2969af6
[INFO] running `"docker" "start" "-a" "258d50d0d02e76081e53f79061fc464153ee14262490421834aa9de9c2969af6"`
[INFO] [stderr]    Compiling flut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:89:17
[INFO] [stderr]    |
[INFO] [stderr] 89 |             let mut socket = UdpSocket::bind(format!("127.0.0.1:{}", port)).expect("udp socket could not get created");
[INFO] [stderr]    |                 ----^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "258d50d0d02e76081e53f79061fc464153ee14262490421834aa9de9c2969af6"`
[INFO] running `"docker" "rm" "-f" "258d50d0d02e76081e53f79061fc464153ee14262490421834aa9de9c2969af6"`
[INFO] [stdout] 258d50d0d02e76081e53f79061fc464153ee14262490421834aa9de9c2969af6
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 7106157ff43247ae1e49aa0b21fb7a0a011be4cc0815555379d01bc213c484d6
[INFO] running `"docker" "start" "-a" "7106157ff43247ae1e49aa0b21fb7a0a011be4cc0815555379d01bc213c484d6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/flut-60236965f151bfa8
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7106157ff43247ae1e49aa0b21fb7a0a011be4cc0815555379d01bc213c484d6"`
[INFO] running `"docker" "rm" "-f" "7106157ff43247ae1e49aa0b21fb7a0a011be4cc0815555379d01bc213c484d6"`
[INFO] [stdout] 7106157ff43247ae1e49aa0b21fb7a0a011be4cc0815555379d01bc213c484d6