[INFO] cloning repository https://github.com/stephanhorvath/rust_book_web_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stephanhorvath/rust_book_web_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephanhorvath%2Frust_book_web_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephanhorvath%2Frust_book_web_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f4ccf55411426243eccff6cbd07ade925f452e5
[INFO] checking stephanhorvath/rust_book_web_server against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephanhorvath%2Frust_book_web_server" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/stephanhorvath/rust_book_web_server
[INFO] finished tweaking git repo https://github.com/stephanhorvath/rust_book_web_server
[INFO] tweaked toml for git repo https://github.com/stephanhorvath/rust_book_web_server written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/stephanhorvath/rust_book_web_server on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/stephanhorvath/rust_book_web_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5483df7883bf8a489315c3f76ec85705b017be05b301efb16c748b879eea0f91
[INFO] running `Command { std: "docker" "start" "-a" "5483df7883bf8a489315c3f76ec85705b017be05b301efb16c748b879eea0f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5483df7883bf8a489315c3f76ec85705b017be05b301efb16c748b879eea0f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5483df7883bf8a489315c3f76ec85705b017be05b301efb16c748b879eea0f91", kill_on_drop: false }`
[INFO] [stdout] 5483df7883bf8a489315c3f76ec85705b017be05b301efb16c748b879eea0f91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d010bff1325cc2ea06ce55d926194467eef1b5ffda4e541e4f9e221271d04f28
[INFO] running `Command { std: "docker" "start" "-a" "d010bff1325cc2ea06ce55d926194467eef1b5ffda4e541e4f9e221271d04f28", kill_on_drop: false }`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:70:72
[INFO] [stdout]    |
[INFO] [stdout] 70 |       pub fn build(size: usize) -> Result<ThreadPool, PoolCreationError> {
[INFO] [stdout]    |  ________________________________________________________________________^
[INFO] [stdout] 71 | |         let thread_pool = match size {
[INFO] [stdout] 72 | |             s if size > 0 => {
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] ...  |
[INFO] [stdout] 89 | |         thread_pool
[INFO] [stdout] 90 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |           let thread_pool = match size {
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 72 | |             s if size > 0 => {
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] 74 | |                 let receiver = Arc::new(Mutex::new(receiver));
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |             _ => panic!("Error building ThreadPool"),
[INFO] [stdout] 87 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:72:30
[INFO] [stdout]    |
[INFO] [stdout] 72 |               s if size > 0 => {
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] 74 | |                 let receiver = Arc::new(Mutex::new(receiver));
[INFO] [stdout] 75 | |                 let mut workers = Vec::with_capacity(s);
[INFO] [stdout] ...  |
[INFO] [stdout] 84 | |                 })
[INFO] [stdout] 85 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 | /                 Ok(ThreadPool { 
[INFO] [stdout] 82 | |                     workers, 
[INFO] [stdout] 83 | |                     sender: Some(sender),
[INFO] [stdout] 84 | |                 })
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         thread_pool
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello` (lib test) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:70:72
[INFO] [stdout]    |
[INFO] [stdout] 70 |       pub fn build(size: usize) -> Result<ThreadPool, PoolCreationError> {
[INFO] [stdout]    |  ________________________________________________________________________^
[INFO] [stdout] 71 | |         let thread_pool = match size {
[INFO] [stdout] 72 | |             s if size > 0 => {
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] ...  |
[INFO] [stdout] 89 | |         thread_pool
[INFO] [stdout] 90 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |           let thread_pool = match size {
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 72 | |             s if size > 0 => {
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] 74 | |                 let receiver = Arc::new(Mutex::new(receiver));
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |             _ => panic!("Error building ThreadPool"),
[INFO] [stdout] 87 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:72:30
[INFO] [stdout]    |
[INFO] [stdout] 72 |               s if size > 0 => {
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 73 | |                 let (sender, receiver) = mpsc::channel();
[INFO] [stdout] 74 | |                 let receiver = Arc::new(Mutex::new(receiver));
[INFO] [stdout] 75 | |                 let mut workers = Vec::with_capacity(s);
[INFO] [stdout] ...  |
[INFO] [stdout] 84 | |                 })
[INFO] [stdout] 85 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 | /                 Ok(ThreadPool { 
[INFO] [stdout] 82 | |                     workers, 
[INFO] [stdout] 83 | |                     sender: Some(sender),
[INFO] [stdout] 84 | |                 })
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ThreadPool, PoolCreationError>
[INFO] [stdout]   --> src/lib.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         thread_pool
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "d010bff1325cc2ea06ce55d926194467eef1b5ffda4e541e4f9e221271d04f28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d010bff1325cc2ea06ce55d926194467eef1b5ffda4e541e4f9e221271d04f28", kill_on_drop: false }`
[INFO] [stdout] d010bff1325cc2ea06ce55d926194467eef1b5ffda4e541e4f9e221271d04f28
