Dec 19 09:08:44.291 INFO checking sebglazebrook/udp-server against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:08:44.291 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:08:44.687 INFO [stdout] 6c72ab5fef0b7573836e8b877bec5733e253528663de3fd94f218d924b6a04c8
Dec 19 09:08:44.692 INFO running `"docker" "start" "-a" "6c72ab5fef0b7573836e8b877bec5733e253528663de3fd94f218d924b6a04c8"`
Dec 19 09:08:46.566 INFO [stderr]     Checking nix v0.9.0
Dec 19 09:08:50.944 INFO [stderr]     Checking ctrlc v3.1.0
Dec 19 09:08:51.286 INFO [stderr]     Checking udp-server v0.1.0 (/opt/crater/workdir)
Dec 19 09:08:51.520 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:08:51.520 INFO [stderr]   --> src/main.rs:39:13
Dec 19 09:08:51.520 INFO [stderr]    |
Dec 19 09:08:51.520 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 19 09:08:51.520 INFO [stderr]    |             ----^^^^^^
Dec 19 09:08:51.520 INFO [stderr]    |             |
Dec 19 09:08:51.520 INFO [stderr]    |             help: remove this `mut`
Dec 19 09:08:51.520 INFO [stderr]    |
Dec 19 09:08:51.520 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:08:51.520 INFO [stderr] 
Dec 19 09:08:51.520 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.520 INFO [stderr]   --> src/main.rs:24:9
Dec 19 09:08:51.520 INFO [stderr]    |
Dec 19 09:08:51.520 INFO [stderr] 24 |         self.start_listening();
Dec 19 09:08:51.520 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:51.521 INFO [stderr]    |
Dec 19 09:08:51.521 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:08:51.521 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.521 INFO [stderr] 
Dec 19 09:08:51.521 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.521 INFO [stderr]   --> src/main.rs:31:3
Dec 19 09:08:51.521 INFO [stderr]    |
Dec 19 09:08:51.521 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 19 09:08:51.521 INFO [stderr]    |  _________^
Dec 19 09:08:51.521 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 19 09:08:51.521 INFO [stderr] 33 | |         });
Dec 19 09:08:51.521 INFO [stderr]    | |___________^
Dec 19 09:08:51.521 INFO [stderr]    |
Dec 19 09:08:51.521 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.521 INFO [stderr] 
Dec 19 09:08:51.565 INFO [stderr] warning: variable does not need to be mutable
Dec 19 09:08:51.565 INFO [stderr]   --> src/main.rs:39:13
Dec 19 09:08:51.565 INFO [stderr]    |
Dec 19 09:08:51.565 INFO [stderr] 39 |         let mut socket = try!(UdpSocket::bind("0.0.0.0:34254"));
Dec 19 09:08:51.566 INFO [stderr]    |             ----^^^^^^
Dec 19 09:08:51.566 INFO [stderr]    |             |
Dec 19 09:08:51.566 INFO [stderr]    |             help: remove this `mut`
Dec 19 09:08:51.566 INFO [stderr]    |
Dec 19 09:08:51.566 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 09:08:51.566 INFO [stderr] 
Dec 19 09:08:51.566 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.566 INFO [stderr]   --> src/main.rs:24:9
Dec 19 09:08:51.566 INFO [stderr]    |
Dec 19 09:08:51.566 INFO [stderr] 24 |         self.start_listening();
Dec 19 09:08:51.566 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:51.566 INFO [stderr]    |
Dec 19 09:08:51.566 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 09:08:51.566 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.566 INFO [stderr] 
Dec 19 09:08:51.566 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 09:08:51.566 INFO [stderr]   --> src/main.rs:31:3
Dec 19 09:08:51.566 INFO [stderr]    |
Dec 19 09:08:51.566 INFO [stderr] 31 |           ctrlc::set_handler(move || {
Dec 19 09:08:51.566 INFO [stderr]    |  _________^
Dec 19 09:08:51.566 INFO [stderr] 32 | |             running.store(false, Ordering::SeqCst); 
Dec 19 09:08:51.566 INFO [stderr] 33 | |         });
Dec 19 09:08:51.566 INFO [stderr]    | |___________^
Dec 19 09:08:51.566 INFO [stderr]    |
Dec 19 09:08:51.566 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 09:08:51.566 INFO [stderr] 
Dec 19 09:08:51.597 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.10s
Dec 19 09:08:52.624 INFO running `"docker" "inspect" "6c72ab5fef0b7573836e8b877bec5733e253528663de3fd94f218d924b6a04c8"`
Dec 19 09:08:52.916 INFO running `"docker" "rm" "-f" "6c72ab5fef0b7573836e8b877bec5733e253528663de3fd94f218d924b6a04c8"`
Dec 19 09:08:53.192 INFO [stdout] 6c72ab5fef0b7573836e8b877bec5733e253528663de3fd94f218d924b6a04c8