[INFO] updating cached repository jetilling/rust_example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jetilling/rust_example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jetilling/rust_example" "work/ex/beta-1.37-6/sources/1.36.0/gh/jetilling/rust_example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jetilling/rust_example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jetilling/rust_example" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 106a724b5d32b447596d357d17c3d46fe3a872a7
[INFO] sha for GitHub repo jetilling/rust_example: 106a724b5d32b447596d357d17c3d46fe3a872a7
[INFO] validating manifest of jetilling/rust_example on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jetilling/rust_example on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jetilling/rust_example
[INFO] finished frobbing jetilling/rust_example
[INFO] frobbed toml for jetilling/rust_example written to work/ex/beta-1.37-6/sources/1.36.0/gh/jetilling/rust_example/Cargo.toml
[INFO] started frobbing jetilling/rust_example
[INFO] finished frobbing jetilling/rust_example
[INFO] frobbed toml for jetilling/rust_example written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example/Cargo.toml
[INFO] crate jetilling/rust_example already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jetilling/rust_example against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] e7d0e217595377bd76e0e72cdbe535b3664dcbc73ff8d44cb49e4c4a9f694d86
[INFO] running `"docker" "start" "-a" "e7d0e217595377bd76e0e72cdbe535b3664dcbc73ff8d44cb49e4c4a9f694d86"`
[INFO] [stderr]    Compiling rust_example_app v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub fn execute<F>(&self, f: F)
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]  --> src/lib.rs:4:3
[INFO] [stderr]   |
[INFO] [stderr] 4 |   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:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 39 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "e7d0e217595377bd76e0e72cdbe535b3664dcbc73ff8d44cb49e4c4a9f694d86"`
[INFO] running `"docker" "rm" "-f" "e7d0e217595377bd76e0e72cdbe535b3664dcbc73ff8d44cb49e4c4a9f694d86"`
[INFO] [stdout] e7d0e217595377bd76e0e72cdbe535b3664dcbc73ff8d44cb49e4c4a9f694d86
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 743f4353945c3adb31e97df77f2aa1bff546fc2e332f781059761a55ac809a20
[INFO] running `"docker" "start" "-a" "743f4353945c3adb31e97df77f2aa1bff546fc2e332f781059761a55ac809a20"`
[INFO] [stderr]    Compiling rust_example_app v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub fn execute<F>(&self, f: F)
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]  --> src/lib.rs:4:3
[INFO] [stderr]   |
[INFO] [stderr] 4 |   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:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 39 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "743f4353945c3adb31e97df77f2aa1bff546fc2e332f781059761a55ac809a20"`
[INFO] running `"docker" "rm" "-f" "743f4353945c3adb31e97df77f2aa1bff546fc2e332f781059761a55ac809a20"`
[INFO] [stdout] 743f4353945c3adb31e97df77f2aa1bff546fc2e332f781059761a55ac809a20
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jetilling/rust_example:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] b5010167b53a67e22e8762b7a221d75f914fe4821f93aba33d4a414dc2d686ef
[INFO] running `"docker" "start" "-a" "b5010167b53a67e22e8762b7a221d75f914fe4821f93aba33d4a414dc2d686ef"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_example_app-5ac96e71220662c9
[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] [stderr]      Running /opt/crater/target/debug/deps/main-a5985ee34edab563
[INFO] [stderr]    Doc-tests rust_example_app
[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] [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" "b5010167b53a67e22e8762b7a221d75f914fe4821f93aba33d4a414dc2d686ef"`
[INFO] running `"docker" "rm" "-f" "b5010167b53a67e22e8762b7a221d75f914fe4821f93aba33d4a414dc2d686ef"`
[INFO] [stdout] b5010167b53a67e22e8762b7a221d75f914fe4821f93aba33d4a414dc2d686ef