[INFO] updating cached repository futurepaul/hello_server_learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/futurepaul/hello_server_learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/futurepaul/hello_server_learning" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/futurepaul/hello_server_learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/futurepaul/hello_server_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/futurepaul/hello_server_learning" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/futurepaul/hello_server_learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/futurepaul/hello_server_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3714d0df30151b316407ea53983ac81fe963099d
[INFO] sha for GitHub repo futurepaul/hello_server_learning: 3714d0df30151b316407ea53983ac81fe963099d
[INFO] validating manifest of futurepaul/hello_server_learning on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of futurepaul/hello_server_learning on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing futurepaul/hello_server_learning
[INFO] finished frobbing futurepaul/hello_server_learning
[INFO] frobbed toml for futurepaul/hello_server_learning written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/futurepaul/hello_server_learning/Cargo.toml
[INFO] started frobbing futurepaul/hello_server_learning
[INFO] finished frobbing futurepaul/hello_server_learning
[INFO] frobbed toml for futurepaul/hello_server_learning written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/futurepaul/hello_server_learning/Cargo.toml
[INFO] crate futurepaul/hello_server_learning already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking futurepaul/hello_server_learning against try#06a150c7d11500b41499224f165e9de1de096768 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/try#06a150c7d11500b41499224f165e9de1de096768:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/futurepaul/hello_server_learning:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] edc92679487a612440fc051b44c3a3c58af119394a48589740f762166b41d97e
[INFO] running `"docker" "start" "-a" "edc92679487a612440fc051b44c3a3c58af119394a48589740f762166b41d97e"`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Error`, `Fail`
[INFO] [stderr]  --> src/lib.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use failure::{Error, Fail};
[INFO] [stderr]   |               ^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error`, `Fail`
[INFO] [stderr]  --> src/lib.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use failure::{Error, Fail};
[INFO] [stderr]   |               ^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]   --> src/lib.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   workers: Vec<Worker>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/lib.rs:59:3
[INFO] [stderr]    |
[INFO] [stderr] 59 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:60:3
[INFO] [stderr]    |
[INFO] [stderr] 60 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]   --> src/lib.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   workers: Vec<Worker>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/lib.rs:59:3
[INFO] [stderr]    |
[INFO] [stderr] 59 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:60:3
[INFO] [stderr]    |
[INFO] [stderr] 60 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `how_much_we_read`
[INFO] [stderr]   --> src/main.rs:28:7
[INFO] [stderr]    |
[INFO] [stderr] 28 |   let how_much_we_read = stream.read(&mut buffer).unwrap();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_how_much_we_read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `how_much_written`
[INFO] [stderr]   --> src/main.rs:59:7
[INFO] [stderr]    |
[INFO] [stderr] 59 |   let how_much_written = stream.write(response.as_slice()).unwrap();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_how_much_written`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `how_much_we_read`
[INFO] [stderr]   --> src/main.rs:28:7
[INFO] [stderr]    |
[INFO] [stderr] 28 |   let how_much_we_read = stream.read(&mut buffer).unwrap();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_how_much_we_read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `how_much_written`
[INFO] [stderr]   --> src/main.rs:59:7
[INFO] [stderr]    |
[INFO] [stderr] 59 |   let how_much_written = stream.write(response.as_slice()).unwrap();
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_how_much_written`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `"docker" "inspect" "edc92679487a612440fc051b44c3a3c58af119394a48589740f762166b41d97e"`
[INFO] running `"docker" "rm" "-f" "edc92679487a612440fc051b44c3a3c58af119394a48589740f762166b41d97e"`
[INFO] [stdout] edc92679487a612440fc051b44c3a3c58af119394a48589740f762166b41d97e