[INFO] cloning repository https://github.com/ashishmax31/user_net
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ashishmax31/user_net" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishmax31%2Fuser_net", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishmax31%2Fuser_net'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23bd1b6051b861c64b0b92b6c7d834306678f217
[INFO] checking ashishmax31/user_net against try#075992eda207e1647b699c8c8ada67b32ce7b115 for pr-77271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishmax31%2Fuser_net" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ashishmax31/user_net on toolchain 075992eda207e1647b699c8c8ada67b32ce7b115
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ashishmax31/user_net
[INFO] finished tweaking git repo https://github.com/ashishmax31/user_net
[INFO] tweaked toml for git repo https://github.com/ashishmax31/user_net written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ashishmax31/user_net already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ioctl-macros v0.1.0
[INFO] [stderr]   Downloaded ifstructs v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abf7a94a70716ca60305af26ba5cbfed93c007ae5156fc903a322503f0ba1600
[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" "abf7a94a70716ca60305af26ba5cbfed93c007ae5156fc903a322503f0ba1600", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abf7a94a70716ca60305af26ba5cbfed93c007ae5156fc903a322503f0ba1600", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf7a94a70716ca60305af26ba5cbfed93c007ae5156fc903a322503f0ba1600", kill_on_drop: false }`
[INFO] [stdout] abf7a94a70716ca60305af26ba5cbfed93c007ae5156fc903a322503f0ba1600
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c66ac796ee9ebc87b9303ac079b3a33464952c185c4bafad239fa1424544108a
[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" "c66ac796ee9ebc87b9303ac079b3a33464952c185c4bafad239fa1424544108a", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking ifstructs v0.1.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling ioctl-macros v0.1.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking user_net v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::ipv4::IPv4`
[INFO] [stdout]  --> src/ipv4/udp/udp.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ipv4::IPv4;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Layer4Response`
[INFO] [stdout]  --> src/ipv4/udp/udp_socket.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ipv4::{IPstackWriter, Layer4Response};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `EtherType`
[INFO] [stdout]   --> src/lib.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 | use ethernet::{EtherType, Ethernet};
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ipv4::IPv4`
[INFO] [stdout]  --> src/ipv4/udp/udp.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ipv4::IPv4;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Layer4Response`
[INFO] [stdout]  --> src/ipv4/udp/udp_socket.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::ipv4::{IPstackWriter, Layer4Response};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `EtherType`
[INFO] [stdout]   --> src/lib.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 | use ethernet::{EtherType, Ethernet};
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eth`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         eth: &ethernet::Ethernet,
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_eth`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `layer_3_writer`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:19:59
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn process_packet(frame: ethernet::EthernetFrame, layer_3_writer: &IPstackWriter) {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_layer_3_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:22:18
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Some(mut datagram) => {
[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: constant is never used: `ARP_REQ_OPCODE`
[INFO] [stdout]  --> src/arp/arp.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ARP_REQ_OPCODE: u16 = 1u16;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind`
[INFO] [stdout]  --> src/arp/arp.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     kind: ARPKind,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hrd`
[INFO] [stdout]   --> src/arp/arp.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn hrd(&self) -> [u8; 2] {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pro`
[INFO] [stdout]    --> src/arp/arp.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn pro(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `op`
[INFO] [stdout]    --> src/arp/arp.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spa`
[INFO] [stdout]    --> src/arp/arp.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn spa(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tha`
[INFO] [stdout]    --> src/arp/arp.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn tha(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tpa`
[INFO] [stdout]    --> src/arp/arp.rs:138:12
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn tpa(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tpa_boundary`
[INFO] [stdout]    --> src/arp/arp.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 |     fn tpa_boundary(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reading`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Reading,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dst`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn dst(&self) -> HwAddr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_socket_state`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hw_address`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:142:12
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn hw_address(&self) -> HwAddr {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_from_socket`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn read_from_socket(&self) -> (std::sync::mpsc::Receiver<EthernetFrame>, IPstackWriter) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ECHO_REQ`
[INFO] [stdout]   --> src/ipv4/icmp/icmp.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const ECHO_REQ: u8 = 8u8;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     length: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     chksm: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bind`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn bind<A: std::net::ToSocketAddrs>(
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sock_addr_parse`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn sock_addr_parse(sock_addr: &std::net::SocketAddr) -> Result<(String, u16), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_to_created_sockets`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn add_to_created_sockets(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `htons`
[INFO] [stdout]  --> src/net_util.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn htons(input: &[u8]) -> u16 {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eth`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         eth: &ethernet::Ethernet,
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_eth`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `layer_3_writer`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:19:59
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn process_packet(frame: ethernet::EthernetFrame, layer_3_writer: &IPstackWriter) {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_layer_3_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:22:18
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Some(mut datagram) => {
[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: constant is never used: `ARP_REQ_OPCODE`
[INFO] [stdout]  --> src/arp/arp.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ARP_REQ_OPCODE: u16 = 1u16;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind`
[INFO] [stdout]  --> src/arp/arp.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     kind: ARPKind,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hrd`
[INFO] [stdout]   --> src/arp/arp.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn hrd(&self) -> [u8; 2] {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pro`
[INFO] [stdout]    --> src/arp/arp.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn pro(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `op`
[INFO] [stdout]    --> src/arp/arp.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spa`
[INFO] [stdout]    --> src/arp/arp.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn spa(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tha`
[INFO] [stdout]    --> src/arp/arp.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 |     pub fn tha(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tpa`
[INFO] [stdout]    --> src/arp/arp.rs:138:12
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn tpa(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tpa_boundary`
[INFO] [stdout]    --> src/arp/arp.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 |     fn tpa_boundary(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reading`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Reading,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dst`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn dst(&self) -> HwAddr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_socket_state`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hw_address`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:142:12
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn hw_address(&self) -> HwAddr {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_from_socket`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn read_from_socket(&self) -> (std::sync::mpsc::Receiver<EthernetFrame>, IPstackWriter) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ECHO_REQ`
[INFO] [stdout]   --> src/ipv4/icmp/icmp.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const ECHO_REQ: u8 = 8u8;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     length: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     chksm: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bind`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn bind<A: std::net::ToSocketAddrs>(
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sock_addr_parse`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn sock_addr_parse(sock_addr: &std::net::SocketAddr) -> Result<(String, u16), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_to_created_sockets`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn add_to_created_sockets(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.32s
[INFO] running `Command { std: "docker" "inspect" "c66ac796ee9ebc87b9303ac079b3a33464952c185c4bafad239fa1424544108a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c66ac796ee9ebc87b9303ac079b3a33464952c185c4bafad239fa1424544108a", kill_on_drop: false }`
[INFO] [stdout] c66ac796ee9ebc87b9303ac079b3a33464952c185c4bafad239fa1424544108a