[INFO] updating cached repository https://github.com/cfsamson/examples-io-eventloop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f94e2fb2d5cea80a22f11499ca1a2bfc45bae8b3
[INFO] checking cfsamson/examples-io-eventloop against master#c724b67e1b474262917a5154d74e7072267593fe for pr-74315
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-io-eventloop" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfsamson/examples-io-eventloop on toolchain c724b67e1b474262917a5154d74e7072267593fe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cfsamson/examples-io-eventloop
[INFO] finished tweaking git repo https://github.com/cfsamson/examples-io-eventloop
[INFO] tweaked toml for git repo https://github.com/cfsamson/examples-io-eventloop written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/cfsamson/examples-io-eventloop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 314d7f37a0babf9b61bc99456ea071a14d0dc996f41cc43f62d7e74f5b192faf
[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" "314d7f37a0babf9b61bc99456ea071a14d0dc996f41cc43f62d7e74f5b192faf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "314d7f37a0babf9b61bc99456ea071a14d0dc996f41cc43f62d7e74f5b192faf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "314d7f37a0babf9b61bc99456ea071a14d0dc996f41cc43f62d7e74f5b192faf", kill_on_drop: false }`
[INFO] [stdout] 314d7f37a0babf9b61bc99456ea071a14d0dc996f41cc43f62d7e74f5b192faf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+c724b67e1b474262917a5154d74e7072267593fe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d8103692a4fd1d80e2a4d79b35a383c63af3330f153424bda917fd01a28a2d5
[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" "9d8103692a4fd1d80e2a4d79b35a383c63af3330f153424bda917fd01a28a2d5", kill_on_drop: false }`
[INFO] [stderr]     Checking minimio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/linux.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |     use std::io;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os::raw::c_void`
[INFO] [stdout]    --> src/linux.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 |     use std::os::raw::c_void;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/linux.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |     use std::io;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os::raw::c_void`
[INFO] [stdout]    --> src/linux.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 |     use std::os::raw::c_void;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EPOLL_CTL_DEL`
[INFO] [stdout]    --> src/linux.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub const EPOLL_CTL_DEL: i32 = 2;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EPOLL_CTL_DEL`
[INFO] [stdout]    --> src/linux.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub const EPOLL_CTL_DEL: i32 = 2;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]   --> tests/multiple_registrations.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let mut buffer = String::new();
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/multiple_registrations.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let mut buffer = String::new();
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "9d8103692a4fd1d80e2a4d79b35a383c63af3330f153424bda917fd01a28a2d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d8103692a4fd1d80e2a4d79b35a383c63af3330f153424bda917fd01a28a2d5", kill_on_drop: false }`
[INFO] [stdout] 9d8103692a4fd1d80e2a4d79b35a383c63af3330f153424bda917fd01a28a2d5