[INFO] updating cached repository https://github.com/cfsamson/examples-io-eventloop
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7a7e20a78124f10d88fe868d12d69858ab5dbdd2
[INFO] checking cfsamson/examples-io-eventloop against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-io-eventloop" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfsamson/examples-io-eventloop on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-6/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 `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ec42dfbc896a3b008d87b8e1abb007db5c1630c7a3de2a3ee6b2a07cf685677e
[INFO] running `"docker" "start" "-a" "ec42dfbc896a3b008d87b8e1abb007db5c1630c7a3de2a3ee6b2a07cf685677e"`
[INFO] [stderr]     Checking minimio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]    --> src/linux.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     use std::io;
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:243:21
[INFO] [stderr]     |
[INFO] [stderr] 243 |                     Data { fd } => EpollData::Fd(fd),
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:244:21
[INFO] [stderr]     |
[INFO] [stderr] 244 |                     Data { uint32 } => EpollData::Uint32(uint32),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:245:21
[INFO] [stderr]     |
[INFO] [stderr] 245 |                     Data { uint64 } => EpollData::Uint64(uint64),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EPOLL_CTL_DEL`
[INFO] [stderr]    --> src/linux.rs:185:5
[INFO] [stderr]     |
[INFO] [stderr] 185 |     pub const EPOLL_CTL_DEL: i32 = 2;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]    --> src/linux.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     use std::io;
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:243:21
[INFO] [stderr]     |
[INFO] [stderr] 243 |                     Data { fd } => EpollData::Fd(fd),
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:244:21
[INFO] [stderr]     |
[INFO] [stderr] 244 |                     Data { uint32 } => EpollData::Uint32(uint32),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/linux.rs:245:21
[INFO] [stderr]     |
[INFO] [stderr] 245 |                     Data { uint64 } => EpollData::Uint64(uint64),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EPOLL_CTL_DEL`
[INFO] [stderr]    --> src/linux.rs:185:5
[INFO] [stderr]     |
[INFO] [stderr] 185 |     pub const EPOLL_CTL_DEL: i32 = 2;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/proposed_api.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut will_close = false;
[INFO] [stderr]    |                 ----^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.69s
[INFO] running `"docker" "inspect" "ec42dfbc896a3b008d87b8e1abb007db5c1630c7a3de2a3ee6b2a07cf685677e"`
[INFO] running `"docker" "rm" "-f" "ec42dfbc896a3b008d87b8e1abb007db5c1630c7a3de2a3ee6b2a07cf685677e"`
[INFO] [stdout] ec42dfbc896a3b008d87b8e1abb007db5c1630c7a3de2a3ee6b2a07cf685677e