[INFO] updating cached repository orf/rust-book-demo-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/orf/rust-book-demo-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/orf/rust-book-demo-server" "work/ex/beta-1.38-1/sources/1.37.0/gh/orf/rust-book-demo-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/orf/rust-book-demo-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/orf/rust-book-demo-server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/orf/rust-book-demo-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/orf/rust-book-demo-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 15462ccd1dd1b531a088d90563ebf5566f953062
[INFO] sha for GitHub repo orf/rust-book-demo-server: 15462ccd1dd1b531a088d90563ebf5566f953062
[INFO] validating manifest of orf/rust-book-demo-server on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of orf/rust-book-demo-server on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing orf/rust-book-demo-server
[INFO] finished frobbing orf/rust-book-demo-server
[INFO] frobbed toml for orf/rust-book-demo-server written to work/ex/beta-1.38-1/sources/1.37.0/gh/orf/rust-book-demo-server/Cargo.toml
[INFO] started frobbing orf/rust-book-demo-server
[INFO] finished frobbing orf/rust-book-demo-server
[INFO] frobbed toml for orf/rust-book-demo-server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/orf/rust-book-demo-server/Cargo.toml
[INFO] crate orf/rust-book-demo-server already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing orf/rust-book-demo-server against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/orf/rust-book-demo-server:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] b29238d1a0d01b85fdba846d970a55883ae230944e0cae4a9768327b73b6428b
[INFO] running `"docker" "start" "-a" "b29238d1a0d01b85fdba846d970a55883ae230944e0cae4a9768327b73b6428b"`
[INFO] [stderr]    Compiling rust-web-server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:41:16
[INFO] [stderr]    |
[INFO] [stderr] 41 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]   --> src/lib.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     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:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     thread: thread::JoinHandle<()>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `execute` found for type `std::result::Result<rust_web_server::ThreadPool, rust_web_server::PoolCreationError>` in the current scope
[INFO] [stderr]   --> src/bin/main.rs:20:14
[INFO] [stderr]    |
[INFO] [stderr] 20 |         pool.execute(|| {
[INFO] [stderr]    |              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rust-web-server`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b29238d1a0d01b85fdba846d970a55883ae230944e0cae4a9768327b73b6428b"`
[INFO] running `"docker" "rm" "-f" "b29238d1a0d01b85fdba846d970a55883ae230944e0cae4a9768327b73b6428b"`
[INFO] [stdout] b29238d1a0d01b85fdba846d970a55883ae230944e0cae4a9768327b73b6428b