Dec 19 19:47:55.393 INFO checking blechschmidt/masswhois against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:47:55.393 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/blechschmidt/masswhois:/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 19:47:55.731 INFO [stdout] b841f37b8d01bc7b1d6aa463b63c6f9bc9b62a128718b27783b10450485924f2
Dec 19 19:47:55.733 INFO running `"docker" "start" "-a" "b841f37b8d01bc7b1d6aa463b63c6f9bc9b62a128718b27783b10450485924f2"`
Dec 19 19:47:57.644 INFO [stderr]    Compiling openssl v0.9.13
Dec 19 19:47:57.648 INFO [stderr]    Compiling proc-macro-hack-impl v0.3.3
Dec 19 19:47:57.660 INFO [stderr]    Compiling unindent v0.1.2
Dec 19 19:47:57.660 INFO [stderr]    Compiling trust-dns v0.10.2
Dec 19 19:47:57.660 INFO [stderr]     Checking netbuf v0.4.0
Dec 19 19:47:57.660 INFO [stderr]     Checking iovec v0.1.0
Dec 19 19:47:57.660 INFO [stderr]     Checking net2 v0.2.29
Dec 19 19:47:57.664 INFO [stderr]     Checking backtrace v0.2.3
Dec 19 19:47:59.723 INFO [stderr]     Checking env_logger v0.4.3
Dec 19 19:47:59.724 INFO [stderr]     Checking chrono v0.2.25
Dec 19 19:47:59.860 INFO [stderr]     Checking bytes v0.4.4
Dec 19 19:48:00.237 INFO [stderr]     Checking error-chain v0.1.12
Dec 19 19:48:00.641 INFO [stderr]    Compiling proc-macro-hack v0.3.3
Dec 19 19:48:01.216 INFO [stderr]    Compiling indoc-impl v0.2.1
Dec 19 19:48:01.473 INFO [stderr]     Checking mio v0.6.8
Dec 19 19:48:02.717 INFO [stderr]     Checking tokio-io v0.1.2
Dec 19 19:48:03.741 INFO [stderr]     Checking indoc v0.2.1
Dec 19 19:48:06.168 INFO [stderr]     Checking tokio-core v0.1.7
Dec 19 19:48:07.206 INFO [stderr]     Checking tokio-openssl v0.1.2
Dec 19 19:48:11.796 INFO [stderr]     Checking masswhois v0.1.0 (/opt/crater/workdir)
Dec 19 19:48:12.880 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 19 19:48:12.880 INFO [stderr]    --> src/dnsutils/mod.rs:486:25
Dec 19 19:48:12.880 INFO [stderr]     |
Dec 19 19:48:12.880 INFO [stderr] 486 |         self.expiry.add((ExpiryRef::Positive(keyref, index)), ttl);
Dec 19 19:48:12.880 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 19:48:12.880 INFO [stderr]     |
Dec 19 19:48:12.880 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 19:48:12.880 INFO [stderr] 
Dec 19 19:48:13.016 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 19 19:48:13.016 INFO [stderr]    --> src/dnsutils/mod.rs:486:25
Dec 19 19:48:13.016 INFO [stderr]     |
Dec 19 19:48:13.016 INFO [stderr] 486 |         self.expiry.add((ExpiryRef::Positive(keyref, index)), ttl);
Dec 19 19:48:13.016 INFO [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 19 19:48:13.036 INFO [stderr]     |
Dec 19 19:48:13.036 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 19:48:13.036 INFO [stderr] 
Dec 19 19:48:13.337 INFO [stderr] warning: value assigned to `nocache` is never read
Dec 19 19:48:13.337 INFO [stderr]    --> src/dnsutils/mod.rs:341:17
Dec 19 19:48:13.337 INFO [stderr]     |
Dec 19 19:48:13.337 INFO [stderr] 341 |         let mut nocache = false;
Dec 19 19:48:13.337 INFO [stderr]     |                 ^^^^^^^
Dec 19 19:48:13.337 INFO [stderr]     |
Dec 19 19:48:13.337 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 19 19:48:13.337 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:48:13.337 INFO [stderr] 
Dec 19 19:48:13.337 INFO [stderr] warning: unused variable: `expiry`
Dec 19 19:48:13.337 INFO [stderr]    --> src/dnsutils/mod.rs:462:13
Dec 19 19:48:13.337 INFO [stderr]     |
Dec 19 19:48:13.337 INFO [stderr] 462 |         let expiry = SystemTime::now() + ttl;
Dec 19 19:48:13.337 INFO [stderr]     |             ^^^^^^ help: consider using `_expiry` instead
Dec 19 19:48:13.337 INFO [stderr]     |
Dec 19 19:48:13.337 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:48:13.337 INFO [stderr] 
Dec 19 19:48:13.440 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.440 INFO [stderr]    --> src/dnsutils/mod.rs:161:19
Dec 19 19:48:13.440 INFO [stderr]     |
Dec 19 19:48:13.440 INFO [stderr] 161 |     fn send_query(mut bufvec: &mut Vec<u8>, qname: &String, qtype: RecordType, sock: &mut UdpSocket, to: &SocketAddr, id: u16) {
Dec 19 19:48:13.440 INFO [stderr]     |                   ----^^^^^^
Dec 19 19:48:13.440 INFO [stderr]     |                   |
Dec 19 19:48:13.440 INFO [stderr]     |                   help: remove this `mut`
Dec 19 19:48:13.440 INFO [stderr]     |
Dec 19 19:48:13.440 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 19:48:13.440 INFO [stderr] 
Dec 19 19:48:13.448 INFO [stderr] warning: value assigned to `nocache` is never read
Dec 19 19:48:13.449 INFO [stderr]    --> src/dnsutils/mod.rs:341:17
Dec 19 19:48:13.449 INFO [stderr]     |
Dec 19 19:48:13.449 INFO [stderr] 341 |         let mut nocache = false;
Dec 19 19:48:13.449 INFO [stderr]     |                 ^^^^^^^
Dec 19 19:48:13.449 INFO [stderr]     |
Dec 19 19:48:13.449 INFO [stderr]     = note: #[warn(unused_assignments)] on by default
Dec 19 19:48:13.449 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:48:13.449 INFO [stderr] 
Dec 19 19:48:13.449 INFO [stderr] warning: unused variable: `expiry`
Dec 19 19:48:13.449 INFO [stderr]    --> src/dnsutils/mod.rs:462:13
Dec 19 19:48:13.449 INFO [stderr]     |
Dec 19 19:48:13.449 INFO [stderr] 462 |         let expiry = SystemTime::now() + ttl;
Dec 19 19:48:13.449 INFO [stderr]     |             ^^^^^^ help: consider using `_expiry` instead
Dec 19 19:48:13.449 INFO [stderr]     |
Dec 19 19:48:13.449 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:48:13.449 INFO [stderr] 
Dec 19 19:48:13.468 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.468 INFO [stderr]    --> src/dnsutils/mod.rs:203:13
Dec 19 19:48:13.468 INFO [stderr]     |
Dec 19 19:48:13.468 INFO [stderr] 203 |         let mut recv;
Dec 19 19:48:13.468 INFO [stderr]     |             ----^^^^
Dec 19 19:48:13.468 INFO [stderr]     |             |
Dec 19 19:48:13.468 INFO [stderr]     |             help: remove this `mut`
Dec 19 19:48:13.468 INFO [stderr] 
Dec 19 19:48:13.469 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.469 INFO [stderr]    --> src/dnsutils/mod.rs:316:17
Dec 19 19:48:13.469 INFO [stderr]     |
Dec 19 19:48:13.469 INFO [stderr] 316 |             let mut res = self.resolving.get_mut(&(qname.clone(), qtype));
Dec 19 19:48:13.469 INFO [stderr]     |                 ----^^^
Dec 19 19:48:13.469 INFO [stderr]     |                 |
Dec 19 19:48:13.469 INFO [stderr]     |                 help: remove this `mut`
Dec 19 19:48:13.469 INFO [stderr] 
Dec 19 19:48:13.469 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.469 INFO [stderr]    --> src/dnsutils/mod.rs:344:17
Dec 19 19:48:13.469 INFO [stderr]     |
Dec 19 19:48:13.469 INFO [stderr] 344 |             let mut preferred_cache = preferred_cache.unwrap();
Dec 19 19:48:13.469 INFO [stderr]     |                 ----^^^^^^^^^^^^^^^
Dec 19 19:48:13.469 INFO [stderr]     |                 |
Dec 19 19:48:13.469 INFO [stderr]     |                 help: remove this `mut`
Dec 19 19:48:13.469 INFO [stderr] 
Dec 19 19:48:13.485 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.485 INFO [stderr]    --> src/dnsutils/mod.rs:434:25
Dec 19 19:48:13.485 INFO [stderr]     |
Dec 19 19:48:13.485 INFO [stderr] 434 |                     let mut records = rec.unwrap();
Dec 19 19:48:13.485 INFO [stderr]     |                         ----^^^^^^^
Dec 19 19:48:13.485 INFO [stderr]     |                         |
Dec 19 19:48:13.485 INFO [stderr]     |                         help: remove this `mut`
Dec 19 19:48:13.485 INFO [stderr] 
Dec 19 19:48:13.485 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.485 INFO [stderr]    --> src/dnsutils/mod.rs:494:21
Dec 19 19:48:13.485 INFO [stderr]     |
Dec 19 19:48:13.485 INFO [stderr] 494 |                 let mut record = result.unwrap();
Dec 19 19:48:13.485 INFO [stderr]     |                     ----^^^^^^
Dec 19 19:48:13.485 INFO [stderr]     |                     |
Dec 19 19:48:13.485 INFO [stderr]     |                     help: remove this `mut`
Dec 19 19:48:13.485 INFO [stderr] 
Dec 19 19:48:13.522 INFO [stderr] warning: field is never used: `encoding`
Dec 19 19:48:13.522 INFO [stderr]   --> src/dnsutils/mod.rs:85:5
Dec 19 19:48:13.522 INFO [stderr]    |
Dec 19 19:48:13.522 INFO [stderr] 85 |     encoding: HashMap<String, &'a String>, // 0x20 encoding
Dec 19 19:48:13.522 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.522 INFO [stderr]    |
Dec 19 19:48:13.522 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 19:48:13.522 INFO [stderr] 
Dec 19 19:48:13.522 INFO [stderr] warning: field is never used: `resolve_parallel`
Dec 19 19:48:13.522 INFO [stderr]   --> src/dnsutils/mod.rs:91:5
Dec 19 19:48:13.522 INFO [stderr]    |
Dec 19 19:48:13.522 INFO [stderr] 91 |     resolve_parallel: bool,
Dec 19 19:48:13.522 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.522 INFO [stderr] 
Dec 19 19:48:13.522 INFO [stderr] warning: field is never used: `round_robin`
Dec 19 19:48:13.522 INFO [stderr]   --> src/dnsutils/mod.rs:94:5
Dec 19 19:48:13.522 INFO [stderr]    |
Dec 19 19:48:13.522 INFO [stderr] 94 |     round_robin: RoundRobin,
Dec 19 19:48:13.522 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.522 INFO [stderr] 
Dec 19 19:48:13.522 INFO [stderr] warning: field is never used: `round_robin_index`
Dec 19 19:48:13.522 INFO [stderr]   --> src/dnsutils/mod.rs:95:5
Dec 19 19:48:13.522 INFO [stderr]    |
Dec 19 19:48:13.522 INFO [stderr] 95 |     round_robin_index: usize,
Dec 19 19:48:13.523 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.523 INFO [stderr] 
Dec 19 19:48:13.530 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.530 INFO [stderr]    --> src/dnsutils/mod.rs:164:9
Dec 19 19:48:13.530 INFO [stderr]     |
Dec 19 19:48:13.530 INFO [stderr] 164 |         sock.send_to(msg.to_vec().unwrap().as_slice(), to);
Dec 19 19:48:13.530 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.530 INFO [stderr]     |
Dec 19 19:48:13.530 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 19:48:13.530 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.530 INFO [stderr] 
Dec 19 19:48:13.530 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.530 INFO [stderr]    --> src/dnsutils/mod.rs:192:13
Dec 19 19:48:13.530 INFO [stderr]     |
Dec 19 19:48:13.530 INFO [stderr] 192 |             poll.register(self.socket4.as_mut().unwrap(), Token(start_token + added), Ready::readable(), PollOpt::edge());
Dec 19 19:48:13.530 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.530 INFO [stderr]     |
Dec 19 19:48:13.530 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.530 INFO [stderr] 
Dec 19 19:48:13.530 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.531 INFO [stderr]    --> src/dnsutils/mod.rs:196:13
Dec 19 19:48:13.531 INFO [stderr]     |
Dec 19 19:48:13.531 INFO [stderr] 196 |             poll.register(self.socket6.as_mut().unwrap(), Token(start_token + added), Ready::readable(), PollOpt::edge());
Dec 19 19:48:13.531 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.531 INFO [stderr]     |
Dec 19 19:48:13.531 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.531 INFO [stderr] 
Dec 19 19:48:13.546 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.546 INFO [stderr]    --> src/dnsutils/mod.rs:161:19
Dec 19 19:48:13.546 INFO [stderr]     |
Dec 19 19:48:13.546 INFO [stderr] 161 |     fn send_query(mut bufvec: &mut Vec<u8>, qname: &String, qtype: RecordType, sock: &mut UdpSocket, to: &SocketAddr, id: u16) {
Dec 19 19:48:13.546 INFO [stderr]     |                   ----^^^^^^
Dec 19 19:48:13.546 INFO [stderr]     |                   |
Dec 19 19:48:13.546 INFO [stderr]     |                   help: remove this `mut`
Dec 19 19:48:13.546 INFO [stderr]     |
Dec 19 19:48:13.546 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 19:48:13.546 INFO [stderr] 
Dec 19 19:48:13.561 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.561 INFO [stderr]    --> src/dnsutils/mod.rs:203:13
Dec 19 19:48:13.561 INFO [stderr]     |
Dec 19 19:48:13.561 INFO [stderr] 203 |         let mut recv;
Dec 19 19:48:13.561 INFO [stderr]     |             ----^^^^
Dec 19 19:48:13.561 INFO [stderr]     |             |
Dec 19 19:48:13.561 INFO [stderr]     |             help: remove this `mut`
Dec 19 19:48:13.561 INFO [stderr] 
Dec 19 19:48:13.563 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.563 INFO [stderr]    --> src/dnsutils/mod.rs:316:17
Dec 19 19:48:13.563 INFO [stderr]     |
Dec 19 19:48:13.563 INFO [stderr] 316 |             let mut res = self.resolving.get_mut(&(qname.clone(), qtype));
Dec 19 19:48:13.563 INFO [stderr]     |                 ----^^^
Dec 19 19:48:13.563 INFO [stderr]     |                 |
Dec 19 19:48:13.563 INFO [stderr]     |                 help: remove this `mut`
Dec 19 19:48:13.563 INFO [stderr] 
Dec 19 19:48:13.563 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.563 INFO [stderr]    --> src/dnsutils/mod.rs:344:17
Dec 19 19:48:13.564 INFO [stderr]     |
Dec 19 19:48:13.564 INFO [stderr] 344 |             let mut preferred_cache = preferred_cache.unwrap();
Dec 19 19:48:13.564 INFO [stderr]     |                 ----^^^^^^^^^^^^^^^
Dec 19 19:48:13.564 INFO [stderr]     |                 |
Dec 19 19:48:13.564 INFO [stderr]     |                 help: remove this `mut`
Dec 19 19:48:13.564 INFO [stderr] 
Dec 19 19:48:13.571 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.571 INFO [stderr]    --> src/dnsutils/mod.rs:434:25
Dec 19 19:48:13.571 INFO [stderr]     |
Dec 19 19:48:13.571 INFO [stderr] 434 |                     let mut records = rec.unwrap();
Dec 19 19:48:13.571 INFO [stderr]     |                         ----^^^^^^^
Dec 19 19:48:13.571 INFO [stderr]     |                         |
Dec 19 19:48:13.571 INFO [stderr]     |                         help: remove this `mut`
Dec 19 19:48:13.571 INFO [stderr] 
Dec 19 19:48:13.575 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:48:13.575 INFO [stderr]    --> src/dnsutils/mod.rs:494:21
Dec 19 19:48:13.575 INFO [stderr]     |
Dec 19 19:48:13.575 INFO [stderr] 494 |                 let mut record = result.unwrap();
Dec 19 19:48:13.575 INFO [stderr]     |                     ----^^^^^^
Dec 19 19:48:13.575 INFO [stderr]     |                     |
Dec 19 19:48:13.575 INFO [stderr]     |                     help: remove this `mut`
Dec 19 19:48:13.575 INFO [stderr] 
Dec 19 19:48:13.592 INFO [stderr] warning: field is never used: `encoding`
Dec 19 19:48:13.592 INFO [stderr]   --> src/dnsutils/mod.rs:85:5
Dec 19 19:48:13.592 INFO [stderr]    |
Dec 19 19:48:13.592 INFO [stderr] 85 |     encoding: HashMap<String, &'a String>, // 0x20 encoding
Dec 19 19:48:13.592 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.592 INFO [stderr]    |
Dec 19 19:48:13.592 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 19:48:13.592 INFO [stderr] 
Dec 19 19:48:13.592 INFO [stderr] warning: field is never used: `resolve_parallel`
Dec 19 19:48:13.592 INFO [stderr]   --> src/dnsutils/mod.rs:91:5
Dec 19 19:48:13.592 INFO [stderr]    |
Dec 19 19:48:13.592 INFO [stderr] 91 |     resolve_parallel: bool,
Dec 19 19:48:13.592 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.592 INFO [stderr] 
Dec 19 19:48:13.592 INFO [stderr] warning: field is never used: `round_robin`
Dec 19 19:48:13.592 INFO [stderr]   --> src/dnsutils/mod.rs:94:5
Dec 19 19:48:13.592 INFO [stderr]    |
Dec 19 19:48:13.592 INFO [stderr] 94 |     round_robin: RoundRobin,
Dec 19 19:48:13.592 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.592 INFO [stderr] 
Dec 19 19:48:13.593 INFO [stderr] warning: field is never used: `round_robin_index`
Dec 19 19:48:13.593 INFO [stderr]   --> src/dnsutils/mod.rs:95:5
Dec 19 19:48:13.593 INFO [stderr]    |
Dec 19 19:48:13.593 INFO [stderr] 95 |     round_robin_index: usize,
Dec 19 19:48:13.593 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.593 INFO [stderr] 
Dec 19 19:48:13.598 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.599 INFO [stderr]    --> src/dnsutils/mod.rs:164:9
Dec 19 19:48:13.599 INFO [stderr]     |
Dec 19 19:48:13.599 INFO [stderr] 164 |         sock.send_to(msg.to_vec().unwrap().as_slice(), to);
Dec 19 19:48:13.599 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.599 INFO [stderr]     |
Dec 19 19:48:13.599 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 19:48:13.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.599 INFO [stderr] 
Dec 19 19:48:13.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.599 INFO [stderr]    --> src/dnsutils/mod.rs:192:13
Dec 19 19:48:13.599 INFO [stderr]     |
Dec 19 19:48:13.599 INFO [stderr] 192 |             poll.register(self.socket4.as_mut().unwrap(), Token(start_token + added), Ready::readable(), PollOpt::edge());
Dec 19 19:48:13.599 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.599 INFO [stderr]     |
Dec 19 19:48:13.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.599 INFO [stderr] 
Dec 19 19:48:13.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:48:13.599 INFO [stderr]    --> src/dnsutils/mod.rs:196:13
Dec 19 19:48:13.599 INFO [stderr]     |
Dec 19 19:48:13.600 INFO [stderr] 196 |             poll.register(self.socket6.as_mut().unwrap(), Token(start_token + added), Ready::readable(), PollOpt::edge());
Dec 19 19:48:13.600 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:48:13.600 INFO [stderr]     |
Dec 19 19:48:13.600 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:48:13.600 INFO [stderr] 
Dec 19 19:48:13.642 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.28s
Dec 19 19:48:14.493 INFO running `"docker" "inspect" "b841f37b8d01bc7b1d6aa463b63c6f9bc9b62a128718b27783b10450485924f2"`
Dec 19 19:48:14.898 INFO running `"docker" "rm" "-f" "b841f37b8d01bc7b1d6aa463b63c6f9bc9b62a128718b27783b10450485924f2"`
Dec 19 19:48:15.161 INFO [stdout] b841f37b8d01bc7b1d6aa463b63c6f9bc9b62a128718b27783b10450485924f2