[INFO] updating cached repository https://github.com/Licenser/mio-udp
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43cc148fe53aafd296b02d80a8fd02077c1b5ce4
[INFO] checking Licenser/mio-udp against try#38f08371587f97c145dedb2c055ac7b01bf1e788 for pr-65294
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLicenser%2Fmio-udp" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Licenser/mio-udp on toolchain 38f08371587f97c145dedb2c055ac7b01bf1e788
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Licenser/mio-udp
[INFO] finished tweaking git repo https://github.com/Licenser/mio-udp
[INFO] tweaked toml for git repo https://github.com/Licenser/mio-udp written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Licenser/mio-udp already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "/opt/rustwide/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b38f9093d9db0c678ec37e16b5e1fc1e6b352b314dd802342d372948869bd87e
[INFO] running `"docker" "start" "-a" "b38f9093d9db0c678ec37e16b5e1fc1e6b352b314dd802342d372948869bd87e"`
[INFO] [stderr]     Checking mio-udp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/main.rs:33:25
[INFO] [stderr]    |
[INFO] [stderr] 33 |                     let n = socket.recv(&mut buf).unwrap();
[INFO] [stderr]    |                         ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:24:11
[INFO] [stderr]    |
[INFO] [stderr] 24 |           socket.send_to(b"Argle bargle, foofaraw, hey diddy ho diddy no one knows", ("127.0.0.1", 9000));
[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] warning: unused variable: `n`
[INFO] [stderr]   --> src/main.rs:33:25
[INFO] [stderr]    |
[INFO] [stderr] 33 |                     let n = socket.recv(&mut buf).unwrap();
[INFO] [stderr]    |                         ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:24:11
[INFO] [stderr]    |
[INFO] [stderr] 24 |           socket.send_to(b"Argle bargle, foofaraw, hey diddy ho diddy no one knows", ("127.0.0.1", 9000));
[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 1.20s
[INFO] running `"docker" "inspect" "b38f9093d9db0c678ec37e16b5e1fc1e6b352b314dd802342d372948869bd87e"`
[INFO] running `"docker" "rm" "-f" "b38f9093d9db0c678ec37e16b5e1fc1e6b352b314dd802342d372948869bd87e"`
[INFO] [stdout] b38f9093d9db0c678ec37e16b5e1fc1e6b352b314dd802342d372948869bd87e