[INFO] cloning repository https://github.com/nsproxy-rs/nsproxy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nsproxy-rs/nsproxy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnsproxy-rs%2Fnsproxy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnsproxy-rs%2Fnsproxy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ffdc5a8897e2880ab022ae9fbc2230f3581b9d9
[INFO] checking nsproxy-rs/nsproxy against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnsproxy-rs%2Fnsproxy" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nsproxy-rs/nsproxy on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nsproxy-rs/nsproxy
[INFO] finished tweaking git repo https://github.com/nsproxy-rs/nsproxy
[INFO] tweaked toml for git repo https://github.com/nsproxy-rs/nsproxy written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nsproxy-rs/nsproxy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-trait v0.1.30
[INFO] [stderr]   Downloaded trust-dns-client v0.19.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79042228d4352a20e4a9e5afd633de5320fa2493febdbf213cce02520dae5b33
[INFO] running `Command { std: "docker" "start" "-a" "79042228d4352a20e4a9e5afd633de5320fa2493febdbf213cce02520dae5b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79042228d4352a20e4a9e5afd633de5320fa2493febdbf213cce02520dae5b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79042228d4352a20e4a9e5afd633de5320fa2493febdbf213cce02520dae5b33", kill_on_drop: false }`
[INFO] [stdout] 79042228d4352a20e4a9e5afd633de5320fa2493febdbf213cce02520dae5b33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a3f2fa091a18ab1c2d195cf4574acc8e53d27bb0456c5eb8577e4b39581e44f
[INFO] running `Command { std: "docker" "start" "-a" "0a3f2fa091a18ab1c2d195cf4574acc8e53d27bb0456c5eb8577e4b39581e44f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking data-encoding v2.2.0
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking nibble_vec v0.0.4
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking radix_trie v0.1.6
[INFO] [stderr]     Checking clap v2.27.1
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.14
[INFO] [stderr]    Compiling async-trait v0.1.30
[INFO] [stderr]    Compiling enum-as-inner v0.3.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking tokio v0.2.16
[INFO] [stderr]     Checking thiserror v1.0.14
[INFO] [stderr]     Checking trust-dns-proto v0.19.3
[INFO] [stderr]     Checking trust-dns-client v0.19.3
[INFO] [stderr]     Checking nsproxy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> src/dns_server.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProxyMethod` is never used
[INFO] [stdout]  --> src/config.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum ProxyMethod {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProxyProtocol` is never used
[INFO] [stdout]  --> src/config.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum ProxyProtocol {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Auth` is never constructed
[INFO] [stdout]   --> src/config.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Auth {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProxyConfig` is never constructed
[INFO] [stdout]   --> src/config.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct ProxyConfig {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]   --> src/config.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Config {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BASE_IPV4_ADDR` is never used
[INFO] [stdout]   --> src/dns_server.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const BASE_IPV4_ADDR: u32 = 0x0D000000;  // 13.0.0.0
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIRST_IPV4_ADDR` is never used
[INFO] [stdout]   --> src/dns_server.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const FIRST_IPV4_ADDR: u32 = BASE_IPV4_ADDR + 1;  // 13.0.0.1
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DnsServer` is never constructed
[INFO] [stdout]   --> src/dns_server.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct DnsServer {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DnsServer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `bind`, `port`, `ipv4_mapping`, `run`, `create_rdata_for_domain`, and `create_ipv4_addr_for_domain` are never used
[INFO] [stdout]   --> src/dns_server.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl DnsServer {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 25 |     pub async fn bind<A: ToSocketAddrs>(addr: A) -> Result<DnsServer, tokio::io::Error> {
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn port(&self) -> Result<u16, tokio::io::Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn ipv4_mapping(&self) -> Arc<Mutex<Ipv4Mapping>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     pub async fn run(mut self) -> Result<(), tokio::io::Error> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     async fn create_rdata_for_domain(&mut self, name: &Name, record_type: RecordType) -> RData {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     async fn create_ipv4_addr_for_domain(&mut self, name: &Name) -> Ipv4Addr {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `addr_to_name` and `name_to_addr` are never read
[INFO] [stdout]  --> src/mapping.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Ipv4Mapping {
[INFO] [stdout]   |            ----------- fields in this struct
[INFO] [stdout] 7 |     pub addr_to_name: HashMap<Ipv4Addr, Name>,
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout] 8 |     pub name_to_addr: HashMap<Name, Ipv4Addr>,
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ipv4Mapping` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> src/dns_server.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProxyMethod` is never used
[INFO] [stdout]  --> src/config.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum ProxyMethod {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProxyProtocol` is never used
[INFO] [stdout]  --> src/config.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum ProxyProtocol {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Auth` is never constructed
[INFO] [stdout]   --> src/config.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Auth {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProxyConfig` is never constructed
[INFO] [stdout]   --> src/config.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct ProxyConfig {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Config` is never constructed
[INFO] [stdout]   --> src/config.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Config {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.90s
[INFO] running `Command { std: "docker" "inspect" "0a3f2fa091a18ab1c2d195cf4574acc8e53d27bb0456c5eb8577e4b39581e44f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a3f2fa091a18ab1c2d195cf4574acc8e53d27bb0456c5eb8577e4b39581e44f", kill_on_drop: false }`
[INFO] [stdout] 0a3f2fa091a18ab1c2d195cf4574acc8e53d27bb0456c5eb8577e4b39581e44f