Dec 17 15:47:45.131 INFO checking sebglazebrook/udp-server against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 15:47:45.131 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:47:45.774 INFO [stdout] 5560c9227443b2f3af734c7bbb2dd1537086ec12f33ae154f5ab478c76e4cea5
Dec 17 15:47:45.778 INFO running `"docker" "start" "-a" "5560c9227443b2f3af734c7bbb2dd1537086ec12f33ae154f5ab478c76e4cea5"`
Dec 17 15:47:47.680 INFO [stderr]     Checking nix v0.9.0
Dec 17 15:47:52.136 INFO [stderr]     Checking ctrlc v3.1.0
Dec 17 15:47:52.393 INFO [stderr]     Checking udp-server v0.1.0 (/opt/crater/workdir)
Dec 17 15:47:52.799 INFO [stderr] warning: variable does not need to be mutable
Dec 17 15:47:52.800 INFO [stderr]   --> src/main.rs:39:13
Dec 17 15:47:52.800 INFO [stderr]    |
Dec 17 15:47:52.800 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 17 15:47:52.801 INFO [stderr]    |             ----^^^^^^
Dec 17 15:47:52.801 INFO [stderr]    |             |
Dec 17 15:47:52.801 INFO [stderr]    |             help: remove this `mut`
Dec 17 15:47:52.802 INFO [stderr]    |
Dec 17 15:47:52.802 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 15:47:52.802 INFO [stderr] 
Dec 17 15:47:52.802 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:47:52.803 INFO [stderr]   --> src/main.rs:24:9
Dec 17 15:47:52.803 INFO [stderr]    |
Dec 17 15:47:52.803 INFO [stderr] 24 |         self.start_listening();
Dec 17 15:47:52.804 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:47:52.804 INFO [stderr]    |
Dec 17 15:47:52.804 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:47:52.805 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:47:52.805 INFO [stderr] 
Dec 17 15:47:52.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:47:52.805 INFO [stderr]   --> src/main.rs:31:3
Dec 17 15:47:52.806 INFO [stderr]    |
Dec 17 15:47:52.806 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 17 15:47:52.806 INFO [stderr]    |  _________^
Dec 17 15:47:52.807 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 17 15:47:52.807 INFO [stderr] 33 | |         });
Dec 17 15:47:52.807 INFO [stderr]    | |___________^
Dec 17 15:47:52.808 INFO [stderr]    |
Dec 17 15:47:52.808 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:47:52.808 INFO [stderr] 
Dec 17 15:47:52.901 INFO [stderr] warning: variable does not need to be mutable
Dec 17 15:47:52.901 INFO [stderr]   --> src/main.rs:39:13
Dec 17 15:47:52.902 INFO [stderr]    |
Dec 17 15:47:52.902 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 17 15:47:52.902 INFO [stderr]    |             ----^^^^^^
Dec 17 15:47:52.903 INFO [stderr]    |             |
Dec 17 15:47:52.903 INFO [stderr]    |             help: remove this `mut`
Dec 17 15:47:52.903 INFO [stderr]    |
Dec 17 15:47:52.903 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 15:47:52.903 INFO [stderr] 
Dec 17 15:47:52.904 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:47:52.904 INFO [stderr]   --> src/main.rs:24:9
Dec 17 15:47:52.904 INFO [stderr]    |
Dec 17 15:47:52.905 INFO [stderr] 24 |         self.start_listening();
Dec 17 15:47:52.905 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:47:52.905 INFO [stderr]    |
Dec 17 15:47:52.905 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:47:52.905 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:47:52.905 INFO [stderr] 
Dec 17 15:47:52.905 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:47:52.905 INFO [stderr]   --> src/main.rs:31:3
Dec 17 15:47:52.905 INFO [stderr]    |
Dec 17 15:47:52.905 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 17 15:47:52.905 INFO [stderr]    |  _________^
Dec 17 15:47:52.905 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 17 15:47:52.905 INFO [stderr] 33 | |         });
Dec 17 15:47:52.906 INFO [stderr]    | |___________^
Dec 17 15:47:52.906 INFO [stderr]    |
Dec 17 15:47:52.906 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:47:52.906 INFO [stderr] 
Dec 17 15:47:52.944 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.31s
Dec 17 15:47:54.030 INFO running `"docker" "inspect" "5560c9227443b2f3af734c7bbb2dd1537086ec12f33ae154f5ab478c76e4cea5"`
Dec 17 15:47:54.312 INFO running `"docker" "rm" "-f" "5560c9227443b2f3af734c7bbb2dd1537086ec12f33ae154f5ab478c76e4cea5"`
Dec 17 15:47:54.728 INFO [stdout] 5560c9227443b2f3af734c7bbb2dd1537086ec12f33ae154f5ab478c76e4cea5