Dec 19 09:08:44.060 INFO checking sebglazebrook/udp-server against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 09:08:44.060 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/sebglazebrook/udp-server:/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=forbid" "-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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:08:44.638 INFO [stdout] c1fcc76e49221ec111daeee5d95acf972020e1a579971af37da17b43a97817fd
Dec 19 09:08:44.640 INFO running `"docker" "start" "-a" "c1fcc76e49221ec111daeee5d95acf972020e1a579971af37da17b43a97817fd"`
Dec 19 09:08:46.469 INFO [stderr]     Checking nix v0.9.0
Dec 19 09:08:50.756 INFO [stderr]     Checking ctrlc v3.1.0
Dec 19 09:08:51.086 INFO [stderr]     Checking udp-server v0.1.0 (/opt/crater/workdir)
Dec 19 09:08:51.536 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:08:51.537 INFO [stderr]   --> src/main.rs:39:13
Dec 19 09:08:51.537 INFO [stderr]    |
Dec 19 09:08:51.537 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 19 09:08:51.537 INFO [stderr]    |             ----^^^^^^
Dec 19 09:08:51.538 INFO [stderr]    |             |
Dec 19 09:08:51.538 INFO [stderr]    |             help: remove this `mut`
Dec 19 09:08:51.538 INFO [stderr]    |
Dec 19 09:08:51.538 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:08:51.538 INFO [stderr] 
Dec 19 09:08:51.539 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.539 INFO [stderr]   --> src/main.rs:24:9
Dec 19 09:08:51.539 INFO [stderr]    |
Dec 19 09:08:51.539 INFO [stderr] 24 |         self.start_listening();
Dec 19 09:08:51.539 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:51.540 INFO [stderr]    |
Dec 19 09:08:51.540 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:08:51.540 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.540 INFO [stderr] 
Dec 19 09:08:51.541 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.541 INFO [stderr]   --> src/main.rs:31:3
Dec 19 09:08:51.541 INFO [stderr]    |
Dec 19 09:08:51.541 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 19 09:08:51.541 INFO [stderr]    |  _________^
Dec 19 09:08:51.542 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 19 09:08:51.542 INFO [stderr] 33 | |         });
Dec 19 09:08:51.542 INFO [stderr]    | |___________^
Dec 19 09:08:51.542 INFO [stderr]    |
Dec 19 09:08:51.543 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.543 INFO [stderr] 
Dec 19 09:08:51.550 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:08:51.550 INFO [stderr]   --> src/main.rs:39:13
Dec 19 09:08:51.550 INFO [stderr]    |
Dec 19 09:08:51.550 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 19 09:08:51.550 INFO [stderr]    |             ----^^^^^^
Dec 19 09:08:51.550 INFO [stderr]    |             |
Dec 19 09:08:51.550 INFO [stderr]    |             help: remove this `mut`
Dec 19 09:08:51.551 INFO [stderr]    |
Dec 19 09:08:51.551 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:08:51.551 INFO [stderr] 
Dec 19 09:08:51.554 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.555 INFO [stderr]   --> src/main.rs:24:9
Dec 19 09:08:51.555 INFO [stderr]    |
Dec 19 09:08:51.555 INFO [stderr] 24 |         self.start_listening();
Dec 19 09:08:51.555 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:51.555 INFO [stderr]    |
Dec 19 09:08:51.555 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:08:51.555 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.555 INFO [stderr] 
Dec 19 09:08:51.555 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.556 INFO [stderr]   --> src/main.rs:31:3
Dec 19 09:08:51.556 INFO [stderr]    |
Dec 19 09:08:51.556 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 19 09:08:51.556 INFO [stderr]    |  _________^
Dec 19 09:08:51.556 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 19 09:08:51.556 INFO [stderr] 33 | |         });
Dec 19 09:08:51.556 INFO [stderr]    | |___________^
Dec 19 09:08:51.556 INFO [stderr]    |
Dec 19 09:08:51.556 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.556 INFO [stderr] 
Dec 19 09:08:51.616 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.20s
Dec 19 09:08:52.724 INFO running `"docker" "inspect" "c1fcc76e49221ec111daeee5d95acf972020e1a579971af37da17b43a97817fd"`
Dec 19 09:08:52.960 INFO running `"docker" "rm" "-f" "c1fcc76e49221ec111daeee5d95acf972020e1a579971af37da17b43a97817fd"`
Dec 19 09:08:53.276 INFO [stdout] c1fcc76e49221ec111daeee5d95acf972020e1a579971af37da17b43a97817fd