[INFO] updating cached repository Voronchikhin/networking_labs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Voronchikhin/networking_labs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Voronchikhin/networking_labs" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/Voronchikhin/networking_labs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/Voronchikhin/networking_labs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Voronchikhin/networking_labs" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/Voronchikhin/networking_labs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/Voronchikhin/networking_labs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 892f4113571145b7383298258c3129f4a177dbcf
[INFO] sha for GitHub repo Voronchikhin/networking_labs: 892f4113571145b7383298258c3129f4a177dbcf
[INFO] validating manifest of Voronchikhin/networking_labs on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Voronchikhin/networking_labs on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Voronchikhin/networking_labs
[INFO] finished frobbing Voronchikhin/networking_labs
[INFO] frobbed toml for Voronchikhin/networking_labs written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/Voronchikhin/networking_labs/Cargo.toml
[INFO] started frobbing Voronchikhin/networking_labs
[INFO] finished frobbing Voronchikhin/networking_labs
[INFO] frobbed toml for Voronchikhin/networking_labs written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/Voronchikhin/networking_labs/Cargo.toml
[INFO] crate Voronchikhin/networking_labs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Voronchikhin/networking_labs against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-7/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/Voronchikhin/networking_labs:/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e4829715ad2de0d0ee237cb44e65bc09c4a7be61cc98ecbefe1c7a070f659130
[INFO] running `"docker" "start" "-a" "e4829715ad2de0d0ee237cb44e65bc09c4a7be61cc98ecbefe1c7a070f659130"`
[INFO] [stderr]     Checking Multicaster v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `net2`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use net2::*;
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let buffer = [0u8; 1600];
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_buffer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Err(e)   => println!("sending error"),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v4_addr`
[INFO] [stderr]   --> src/main.rs:40:20
[INFO] [stderr]    |
[INFO] [stderr] 40 |         IpAddr::V4(v4_addr) => UdpBuilder::new_v4(),
[INFO] [stderr]    |                    ^^^^^^^ help: consider prefixing with an underscore: `_v4_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v6_addr`
[INFO] [stderr]   --> src/main.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |         IpAddr::V6(v6_addr) => UdpBuilder::new_v6(),
[INFO] [stderr]    |                    ^^^^^^^ help: consider prefixing with an underscore: `_v6_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `net2`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use net2::*;
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let buffer = [0u8; 1600];
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_buffer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Err(e)   => println!("sending error"),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v4_addr`
[INFO] [stderr]   --> src/main.rs:40:20
[INFO] [stderr]    |
[INFO] [stderr] 40 |         IpAddr::V4(v4_addr) => UdpBuilder::new_v4(),
[INFO] [stderr]    |                    ^^^^^^^ help: consider prefixing with an underscore: `_v4_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v6_addr`
[INFO] [stderr]   --> src/main.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |         IpAddr::V6(v6_addr) => UdpBuilder::new_v6(),
[INFO] [stderr]    |                    ^^^^^^^ help: consider prefixing with an underscore: `_v6_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: crate `Multicaster` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `multicaster`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     socket.set_read_timeout(Option::from(Duration::from_secs(3)));
[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 `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     _sender_handle.unwrap().join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     _listener_handle.unwrap().join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: crate `Multicaster` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `multicaster`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     socket.set_read_timeout(Option::from(Duration::from_secs(3)));
[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 `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     _sender_handle.unwrap().join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     _listener_handle.unwrap().join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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 1.00s
[INFO] running `"docker" "inspect" "e4829715ad2de0d0ee237cb44e65bc09c4a7be61cc98ecbefe1c7a070f659130"`
[INFO] running `"docker" "rm" "-f" "e4829715ad2de0d0ee237cb44e65bc09c4a7be61cc98ecbefe1c7a070f659130"`
[INFO] [stdout] e4829715ad2de0d0ee237cb44e65bc09c4a7be61cc98ecbefe1c7a070f659130