[INFO] updating cached repository furuhama/epoll
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/furuhama/epoll
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/furuhama/epoll" "work/ex/beta-1.37-6/sources/1.36.0/gh/furuhama/epoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/furuhama/epoll'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/furuhama/epoll" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/furuhama/epoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/furuhama/epoll'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d0424b0a047f489a7d5d7dcea20ea2996980d372
[INFO] sha for GitHub repo furuhama/epoll: d0424b0a047f489a7d5d7dcea20ea2996980d372
[INFO] validating manifest of furuhama/epoll 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 furuhama/epoll 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 furuhama/epoll
[INFO] finished frobbing furuhama/epoll
[INFO] frobbed toml for furuhama/epoll written to work/ex/beta-1.37-6/sources/1.36.0/gh/furuhama/epoll/Cargo.toml
[INFO] started frobbing furuhama/epoll
[INFO] finished frobbing furuhama/epoll
[INFO] frobbed toml for furuhama/epoll written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/furuhama/epoll/Cargo.toml
[INFO] crate furuhama/epoll 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 furuhama/epoll 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-3/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/furuhama/epoll:/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] 6d74336629e519733b3a6b835e0eee806a01222807416cc383907520310a0e6d
[INFO] running `"docker" "start" "-a" "6d74336629e519733b3a6b835e0eee806a01222807416cc383907520310a0e6d"`
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling epoll v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     epoll::epoll();
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.93s
[INFO] running `"docker" "inspect" "6d74336629e519733b3a6b835e0eee806a01222807416cc383907520310a0e6d"`
[INFO] running `"docker" "rm" "-f" "6d74336629e519733b3a6b835e0eee806a01222807416cc383907520310a0e6d"`
[INFO] [stdout] 6d74336629e519733b3a6b835e0eee806a01222807416cc383907520310a0e6d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/furuhama/epoll:/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] f5d805c5ffcb12752622ed9fc11015b20f65278fb285bfc15e1de43f90de3d22
[INFO] running `"docker" "start" "-a" "f5d805c5ffcb12752622ed9fc11015b20f65278fb285bfc15e1de43f90de3d22"`
[INFO] [stderr]    Compiling epoll v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     epoll::epoll();
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "f5d805c5ffcb12752622ed9fc11015b20f65278fb285bfc15e1de43f90de3d22"`
[INFO] running `"docker" "rm" "-f" "f5d805c5ffcb12752622ed9fc11015b20f65278fb285bfc15e1de43f90de3d22"`
[INFO] [stdout] f5d805c5ffcb12752622ed9fc11015b20f65278fb285bfc15e1de43f90de3d22
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/furuhama/epoll:/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] 47efbca5f6cd6b3af449348851af6be4ad518a130d4b23a4b75b46995637c36c
[INFO] running `"docker" "start" "-a" "47efbca5f6cd6b3af449348851af6be4ad518a130d4b23a4b75b46995637c36c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/epoll-de0d25ecbf8e243e
[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/epoll-78fb13f928b088b0
[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]    Doc-tests epoll
[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" "47efbca5f6cd6b3af449348851af6be4ad518a130d4b23a4b75b46995637c36c"`
[INFO] running `"docker" "rm" "-f" "47efbca5f6cd6b3af449348851af6be4ad518a130d4b23a4b75b46995637c36c"`
[INFO] [stdout] 47efbca5f6cd6b3af449348851af6be4ad518a130d4b23a4b75b46995637c36c