[INFO] cloning repository https://github.com/linyihai/lyh-epoll-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/linyihai/lyh-epoll-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinyihai%2Flyh-epoll-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinyihai%2Flyh-epoll-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 19a551f51d9704391cd167ca7ef2f8be2d4823e3
[INFO] testing linyihai/lyh-epoll-demo against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinyihai%2Flyh-epoll-demo" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/linyihai/lyh-epoll-demo on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/linyihai/lyh-epoll-demo
[INFO] finished tweaking git repo https://github.com/linyihai/lyh-epoll-demo
[INFO] tweaked toml for git repo https://github.com/linyihai/lyh-epoll-demo written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/linyihai/lyh-epoll-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b0c6de0d122f3d7d25624b042561b183e4f42eb818e4f4e55c973c28f590df8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7b0c6de0d122f3d7d25624b042561b183e4f42eb818e4f4e55c973c28f590df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b0c6de0d122f3d7d25624b042561b183e4f42eb818e4f4e55c973c28f590df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0c6de0d122f3d7d25624b042561b183e4f42eb818e4f4e55c973c28f590df8", kill_on_drop: false }`
[INFO] [stdout] 7b0c6de0d122f3d7d25624b042561b183e4f42eb818e4f4e55c973c28f590df8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff905a67760d8fd6f9cee6d74f38fba3ea8f3573292b7ca48100c25bd92a3a3c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff905a67760d8fd6f9cee6d74f38fba3ea8f3573292b7ca48100c25bd92a3a3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.106
[INFO] [stderr]    Compiling lyh-rust-epoll-examply v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:4:49
[INFO] [stdout]     |
[INFO] [stdout] 4   |       ($fn: ident ( $($arg: expr),* $(,)* ) ) => {{
[INFO] [stdout]     |  _________________________________________________^
[INFO] [stdout] 5   | |         let res = unsafe { libc::$fn($($arg, )*) };
[INFO] [stdout] 6   | |         if res == -1 {
[INFO] [stdout] 7   | |             Err(std::io::Error::last_os_error())
[INFO] [stdout] ...   |
[INFO] [stdout] 10  | |         }
[INFO] [stdout] 11  | |     }};
[INFO] [stdout]     | |_____^
[INFO] [stdout] ...
[INFO] [stdout] 124 |           syscall!(close(fd));
[INFO] [stdout]     |           ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `syscall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.74s
[INFO] running `Command { std: "docker" "inspect" "ff905a67760d8fd6f9cee6d74f38fba3ea8f3573292b7ca48100c25bd92a3a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff905a67760d8fd6f9cee6d74f38fba3ea8f3573292b7ca48100c25bd92a3a3c", kill_on_drop: false }`
[INFO] [stdout] ff905a67760d8fd6f9cee6d74f38fba3ea8f3573292b7ca48100c25bd92a3a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23929b349a158d4324ca031b50e894fd05acc3fff2ceb848112c7716dc66f5fe
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "23929b349a158d4324ca031b50e894fd05acc3fff2ceb848112c7716dc66f5fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling lyh-rust-epoll-examply v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:4:49
[INFO] [stdout]     |
[INFO] [stdout] 4   |       ($fn: ident ( $($arg: expr),* $(,)* ) ) => {{
[INFO] [stdout]     |  _________________________________________________^
[INFO] [stdout] 5   | |         let res = unsafe { libc::$fn($($arg, )*) };
[INFO] [stdout] 6   | |         if res == -1 {
[INFO] [stdout] 7   | |             Err(std::io::Error::last_os_error())
[INFO] [stdout] ...   |
[INFO] [stdout] 10  | |         }
[INFO] [stdout] 11  | |     }};
[INFO] [stdout]     | |_____^
[INFO] [stdout] ...
[INFO] [stdout] 124 |           syscall!(close(fd));
[INFO] [stdout]     |           ------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `syscall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "23929b349a158d4324ca031b50e894fd05acc3fff2ceb848112c7716dc66f5fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23929b349a158d4324ca031b50e894fd05acc3fff2ceb848112c7716dc66f5fe", kill_on_drop: false }`
[INFO] [stdout] 23929b349a158d4324ca031b50e894fd05acc3fff2ceb848112c7716dc66f5fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9ff6d1469438b18f9717d7f49ff498c1fc20401a97d034f756b0125b001e0c00
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9ff6d1469438b18f9717d7f49ff498c1fc20401a97d034f756b0125b001e0c00", kill_on_drop: false }`
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/main.rs:4:49
[INFO] [stderr]     |
[INFO] [stderr] 4   |       ($fn: ident ( $($arg: expr),* $(,)* ) ) => {{
[INFO] [stderr]     |  _________________________________________________^
[INFO] [stderr] 5   | |         let res = unsafe { libc::$fn($($arg, )*) };
[INFO] [stderr] 6   | |         if res == -1 {
[INFO] [stderr] 7   | |             Err(std::io::Error::last_os_error())
[INFO] [stderr] ...   |
[INFO] [stderr] 10  | |         }
[INFO] [stderr] 11  | |     }};
[INFO] [stderr]     | |_____^
[INFO] [stderr] ...
[INFO] [stderr] 124 |           syscall!(close(fd));
[INFO] [stderr]     |           ------------------- in this macro invocation
[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]     = note: this warning originates in the macro `syscall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `lyh-rust-epoll-examply` (bin "lyh-rust-epoll-examply" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lyh_rust_epoll_examply-59e527c5875991d4)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9ff6d1469438b18f9717d7f49ff498c1fc20401a97d034f756b0125b001e0c00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ff6d1469438b18f9717d7f49ff498c1fc20401a97d034f756b0125b001e0c00", kill_on_drop: false }`
[INFO] [stdout] 9ff6d1469438b18f9717d7f49ff498c1fc20401a97d034f756b0125b001e0c00