[INFO] updating cached repository https://github.com/ntedeschi/systems
[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] a3326d67f88169e07da5d54333db36860b0ac5f5
[INFO] testing ntedeschi/systems against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fntedeschi%2Fsystems" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ntedeschi/systems 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/ntedeschi/systems
[INFO] finished tweaking git repo https://github.com/ntedeschi/systems
[INFO] tweaked toml for git repo https://github.com/ntedeschi/systems written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ntedeschi/systems 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/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] 8d1d8f3990d2d539cdd9481439a4bd66ffe31778a084822a9aca8d50cb58f610
[INFO] running `"docker" "start" "-a" "8d1d8f3990d2d539cdd9481439a4bd66ffe31778a084822a9aca8d50cb58f610"`
[INFO] [stderr]    Compiling libc v0.2.57
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling systems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/ch02/prac.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut f = ".01110";
[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] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/ch02/prac.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut x = fractional_binary_to_decimal(f);
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.69s
[INFO] running `"docker" "inspect" "8d1d8f3990d2d539cdd9481439a4bd66ffe31778a084822a9aca8d50cb58f610"`
[INFO] running `"docker" "rm" "-f" "8d1d8f3990d2d539cdd9481439a4bd66ffe31778a084822a9aca8d50cb58f610"`
[INFO] [stdout] 8d1d8f3990d2d539cdd9481439a4bd66ffe31778a084822a9aca8d50cb58f610
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/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] 28d2d00d56ec42db1e541cf42d2b341426a9545a963418c30245962004b5d45c
[INFO] running `"docker" "start" "-a" "28d2d00d56ec42db1e541cf42d2b341426a9545a963418c30245962004b5d45c"`
[INFO] [stderr]    Compiling systems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/ch02/prac.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut f = ".01110";
[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] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/ch02/prac.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut x = fractional_binary_to_decimal(f);
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `"docker" "inspect" "28d2d00d56ec42db1e541cf42d2b341426a9545a963418c30245962004b5d45c"`
[INFO] running `"docker" "rm" "-f" "28d2d00d56ec42db1e541cf42d2b341426a9545a963418c30245962004b5d45c"`
[INFO] [stdout] 28d2d00d56ec42db1e541cf42d2b341426a9545a963418c30245962004b5d45c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/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] 7a04380119bb1e32630bd9ce07792830d84735a9b695d5c034d6ad62fbc12b0f
[INFO] running `"docker" "start" "-a" "7a04380119bb1e32630bd9ce07792830d84735a9b695d5c034d6ad62fbc12b0f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/systems-c9c9424c46d628b6
[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" "7a04380119bb1e32630bd9ce07792830d84735a9b695d5c034d6ad62fbc12b0f"`
[INFO] running `"docker" "rm" "-f" "7a04380119bb1e32630bd9ce07792830d84735a9b695d5c034d6ad62fbc12b0f"`
[INFO] [stdout] 7a04380119bb1e32630bd9ce07792830d84735a9b695d5c034d6ad62fbc12b0f