[INFO] cloning repository https://github.com/TylerStanish/dns
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TylerStanish/dns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb16ce0371ae5f1ea1d73430b67b5d6cf36035f1
[INFO] checking TylerStanish/dns against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TylerStanish/dns on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TylerStanish/dns
[INFO] finished tweaking git repo https://github.com/TylerStanish/dns
[INFO] tweaked toml for git repo https://github.com/TylerStanish/dns written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/TylerStanish/dns already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dfed446a3ea76043c1128b111e46b2bcfd11dc8af8de6e3dfab4c25f4af622a5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dfed446a3ea76043c1128b111e46b2bcfd11dc8af8de6e3dfab4c25f4af622a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dfed446a3ea76043c1128b111e46b2bcfd11dc8af8de6e3dfab4c25f4af622a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfed446a3ea76043c1128b111e46b2bcfd11dc8af8de6e3dfab4c25f4af622a5", kill_on_drop: false }`
[INFO] [stdout] dfed446a3ea76043c1128b111e46b2bcfd11dc8af8de6e3dfab4c25f4af622a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48f4108e2f0b631dfd4aac48cbf920bcae429f1e4cef540781e8f2f9b7165702
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "48f4108e2f0b631dfd4aac48cbf920bcae429f1e4cef540781e8f2f9b7165702", kill_on_drop: false }`
[INFO] [stderr]    Compiling uninitialized v0.0.2
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking ttl_cache v0.5.1
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking resize-slice v0.1.3
[INFO] [stderr]     Checking dns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ResponseCode`
[INFO] [stdout]  --> src/answer.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::{ResourceType, ResponseCode};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromBytes`
[INFO] [stdout]  --> src/answer.rs:3:63
[INFO] [stdout]   |
[INFO] [stdout] 3 |     deserialize_domain_from_bytes, serialize_domain_to_bytes, FromBytes, ToBytes,
[INFO] [stdout]   |                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SoaInformation`, `extract_string`
[INFO] [stdout]  --> src/authority.rs:9:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::record::{extract_string, Record, SoaInformation};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::blocklist`
[INFO] [stdout]  --> src/client.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::blocklist;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResourceType`
[INFO] [stdout]  --> src/client.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::header::{ResourceType, ResponseCode};
[INFO] [stdout]   |                     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::query::DnsQuery`
[INFO] [stdout]  --> src/client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::query::DnsQuery;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SoaInformation`
[INFO] [stdout]  --> src/client.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::record::{RecordInformation, SoaInformation};
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `deserialize_domain_from_bytes`
[INFO] [stdout]   --> src/client.rs:10:95
[INFO] [stdout]    |
[INFO] [stdout] 10 |     deserialize_ipv4_from_str, deserialize_ipv6_from_str, serialize_domain_to_bytes, ToBytes, deserialize_domain_from_bytes,
[INFO] [stdout]    |                                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResourceType`
[INFO] [stdout]  --> src/packet.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::header::{DnsHeader, ResourceType, ResponseCode};
[INFO] [stdout]   |                                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResponseCode`
[INFO] [stdout]  --> src/query.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::{ResourceType, ResponseCode};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromBytes`
[INFO] [stdout]  --> src/query.rs:3:63
[INFO] [stdout]   |
[INFO] [stdout] 3 |     deserialize_domain_from_bytes, serialize_domain_to_bytes, FromBytes, ToBytes,
[INFO] [stdout]   |                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DnsHeader`
[INFO] [stdout]  --> src/resolvers.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::header::{DnsHeader, ResourceType};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::header::ResponseCode`
[INFO] [stdout]  --> src/serialization.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::ResponseCode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::packet::DnsPacket`
[INFO] [stdout]  --> src/serialization.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::packet::DnsPacket;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResponseCode`
[INFO] [stdout]  --> src/answer.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::{ResourceType, ResponseCode};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `extract_string`
[INFO] [stdout]  --> src/authority.rs:9:21
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::record::{extract_string, Record, SoaInformation};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `create_dir`, `remove_dir_all`
[INFO] [stdout]   --> src/authority.rs:91:19
[INFO] [stdout]    |
[INFO] [stdout] 91 |     use std::fs::{create_dir, read_dir, remove_dir, remove_dir_all, File};
[INFO] [stdout]    |                   ^^^^^^^^^^                        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/authority.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     use std::path::Path;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::blocklist`
[INFO] [stdout]  --> src/client.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::blocklist;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `deserialize_domain_from_bytes`
[INFO] [stdout]   --> src/client.rs:10:95
[INFO] [stdout]    |
[INFO] [stdout] 10 |     deserialize_ipv4_from_str, deserialize_ipv6_from_str, serialize_domain_to_bytes, ToBytes, deserialize_domain_from_bytes,
[INFO] [stdout]    |                                                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `remove_file`
[INFO] [stdout]    --> src/client.rs:190:19
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use std::fs::{remove_file, File};
[INFO] [stdout]     |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ResponseCode`
[INFO] [stdout]  --> src/query.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::{ResourceType, ResponseCode};
[INFO] [stdout]   |                                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DnsHeader`
[INFO] [stdout]  --> src/resolvers.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::header::{DnsHeader, ResourceType};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::header::ResponseCode`
[INFO] [stdout]  --> src/serialization.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::header::ResponseCode;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::packet::DnsPacket`
[INFO] [stdout]  --> src/serialization.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::packet::DnsPacket;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ByteOrder`
[INFO] [stdout]  --> src/record.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use byteorder::{ByteOrder, NetworkEndian, WriteBytesExt};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/header.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             _ => 0, // FIXME should this be 0?
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `flags` is never read
[INFO] [stdout]    --> src/header.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut flags = 0u16;
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/query.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             Err(code) => return Err(DnsQuery::new()),
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/authority.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_nameserver`
[INFO] [stdout]    --> src/client.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn get_nameserver() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_error`
[INFO] [stdout]   --> src/packet.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new_error(err: ResponseCode) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/record.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/record.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/record.rs:141:12
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn new(preference: u16, exchange: String) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stub_resolver`
[INFO] [stdout]  --> src/resolvers.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn stub_resolver(_host: &str, req: packet::DnsPacket) -> packet::DnsPacket {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromBytes`
[INFO] [stdout]  --> src/answer.rs:3:63
[INFO] [stdout]   |
[INFO] [stdout] 3 |     deserialize_domain_from_bytes, serialize_domain_to_bytes, FromBytes, ToBytes,
[INFO] [stdout]   |                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromBytes`
[INFO] [stdout]  --> src/query.rs:3:63
[INFO] [stdout]   |
[INFO] [stdout] 3 |     deserialize_domain_from_bytes, serialize_domain_to_bytes, FromBytes, ToBytes,
[INFO] [stdout]   |                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ByteOrder`
[INFO] [stdout]  --> src/record.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use byteorder::{ByteOrder, NetworkEndian, WriteBytesExt};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/header.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             _ => 0, // FIXME should this be 0?
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `flags` is never read
[INFO] [stdout]    --> src/header.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut flags = 0u16;
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/query.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             Err(code) => return Err(DnsQuery::new()),
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/record.rs:265:13
[INFO] [stdout]     |
[INFO] [stdout] 265 |         let mut expected_mx_info = MXInformation::new(42, "mail.foo.com".to_owned());
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_nameserver`
[INFO] [stdout]    --> src/client.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn get_nameserver() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_error`
[INFO] [stdout]   --> src/packet.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new_error(err: ResponseCode) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stub_resolver`
[INFO] [stdout]  --> src/resolvers.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn stub_resolver(_host: &str, req: packet::DnsPacket) -> packet::DnsPacket {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `Command { std: "docker" "inspect" "48f4108e2f0b631dfd4aac48cbf920bcae429f1e4cef540781e8f2f9b7165702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48f4108e2f0b631dfd4aac48cbf920bcae429f1e4cef540781e8f2f9b7165702", kill_on_drop: false }`
[INFO] [stdout] 48f4108e2f0b631dfd4aac48cbf920bcae429f1e4cef540781e8f2f9b7165702
