[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] 38d8f227748a2f00cdbddef84a3d343440d1f89c
[INFO] testing ashishmax31/user_net against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishmax31%2Fuser_net" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ashishmax31/user_net on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-11/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" "+1.60.0" "fetch" "--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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61e8673227564e715d61ce66f05c85a005bf3605966ba1c95d9dbd7e540c5384
[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" "61e8673227564e715d61ce66f05c85a005bf3605966ba1c95d9dbd7e540c5384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61e8673227564e715d61ce66f05c85a005bf3605966ba1c95d9dbd7e540c5384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e8673227564e715d61ce66f05c85a005bf3605966ba1c95d9dbd7e540c5384", kill_on_drop: false }`
[INFO] [stdout] 61e8673227564e715d61ce66f05c85a005bf3605966ba1c95d9dbd7e540c5384
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31fc61ab8fd4cb57b48d96ad668ad3154f1418a8c82c614aff85aa9bd795c48d
[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" "31fc61ab8fd4cb57b48d96ad668ad3154f1418a8c82c614aff85aa9bd795c48d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling ioctl-macros v0.1.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling ifstructs v0.1.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling user_net v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{thread, time};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eth`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |         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:45:59
[INFO] [stdout]    |
[INFO] [stdout] 45 |     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:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |             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: function is never used: `htons`
[INFO] [stdout]   --> src/net_util.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn htons(input: &[u8]) -> u16 {
[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: `operation`
[INFO] [stdout]   --> src/arp/arp.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn operation(&self) -> ARPKind {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_packet`
[INFO] [stdout]    --> src/arp/arp.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn handle_packet(data: Vec<u8>, eth_addr: [u8; 6]) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_request`
[INFO] [stdout]    --> src/arp/arp.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn build_request(data: Vec<u8>) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hrd`
[INFO] [stdout]    --> src/arp/arp.rs:175:12
[INFO] [stdout]     |
[INFO] [stdout] 175 |     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:181:12
[INFO] [stdout]     |
[INFO] [stdout] 181 |     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:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tha`
[INFO] [stdout]    --> src/arp/arp.rs:213:12
[INFO] [stdout]     |
[INFO] [stdout] 213 |     pub fn tha(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn value(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reading`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     Reading,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `State` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ethernet/ethernet.rs:66:10
[INFO] [stdout]    |
[INFO] [stdout] 66 | #[derive(Clone, Copy)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_response_frame`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn build_response_frame<T>(&self, payload: T) -> Self
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn src(&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:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `version`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     version: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ihl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     ihl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `t_len`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     t_len: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     id: u16,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flags`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     flags: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `frag_offset`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     frag_offset: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ttl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     ttl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chksm`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     chksm: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_str`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout] 189 |     pub fn src_str(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:254:12
[INFO] [stdout]     |
[INFO] [stdout] 254 |     pub fn src_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dst_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:258:12
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn dst_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `payload_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:262:12
[INFO] [stdout]     |
[INFO] [stdout] 262 |     pub fn payload_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[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: associated function is never used: `dst_port`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn dst_port(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn length(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn chksm(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn set_chksm(&mut self, value: u16) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `addr_identifier`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     addr_identifier: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ethernet/ethernet.rs:288:28
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!(err.desc());
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!("{}", err.desc());
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 36 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.19s
[INFO] running `Command { std: "docker" "inspect" "31fc61ab8fd4cb57b48d96ad668ad3154f1418a8c82c614aff85aa9bd795c48d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31fc61ab8fd4cb57b48d96ad668ad3154f1418a8c82c614aff85aa9bd795c48d", kill_on_drop: false }`
[INFO] [stdout] 31fc61ab8fd4cb57b48d96ad668ad3154f1418a8c82c614aff85aa9bd795c48d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b85e2b706031937785d15df1685554bdbc357846dfc2cdb1087ad8e8e6fc372f
[INFO] running `Command { std: "docker" "start" "-a" "b85e2b706031937785d15df1685554bdbc357846dfc2cdb1087ad8e8e6fc372f", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{thread, time};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eth`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |         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:45:59
[INFO] [stdout]    |
[INFO] [stdout] 45 |     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:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |             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: function is never used: `htons`
[INFO] [stdout]   --> src/net_util.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn htons(input: &[u8]) -> u16 {
[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: `operation`
[INFO] [stdout]   --> src/arp/arp.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn operation(&self) -> ARPKind {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_packet`
[INFO] [stdout]    --> src/arp/arp.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn handle_packet(data: Vec<u8>, eth_addr: [u8; 6]) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_request`
[INFO] [stdout]    --> src/arp/arp.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn build_request(data: Vec<u8>) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hrd`
[INFO] [stdout]    --> src/arp/arp.rs:175:12
[INFO] [stdout]     |
[INFO] [stdout] 175 |     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:181:12
[INFO] [stdout]     |
[INFO] [stdout] 181 |     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:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tha`
[INFO] [stdout]    --> src/arp/arp.rs:213:12
[INFO] [stdout]     |
[INFO] [stdout] 213 |     pub fn tha(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn value(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reading`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     Reading,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `State` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ethernet/ethernet.rs:66:10
[INFO] [stdout]    |
[INFO] [stdout] 66 | #[derive(Clone, Copy)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_response_frame`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn build_response_frame<T>(&self, payload: T) -> Self
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn src(&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:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `version`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     version: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ihl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     ihl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `t_len`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     t_len: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling user_net v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     id: u16,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flags`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     flags: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `frag_offset`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     frag_offset: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ttl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     ttl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chksm`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     chksm: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_str`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout] 189 |     pub fn src_str(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:254:12
[INFO] [stdout]     |
[INFO] [stdout] 254 |     pub fn src_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dst_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:258:12
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn dst_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `payload_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:262:12
[INFO] [stdout]     |
[INFO] [stdout] 262 |     pub fn payload_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[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: associated function is never used: `dst_port`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn dst_port(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn length(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn chksm(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn set_chksm(&mut self, value: u16) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `addr_identifier`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     addr_identifier: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ethernet/ethernet.rs:288:28
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!(err.desc());
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!("{}", err.desc());
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 36 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{thread, time};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eth`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |         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:45:59
[INFO] [stdout]    |
[INFO] [stdout] 45 |     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:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |             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: associated function is never used: `operation`
[INFO] [stdout]   --> src/arp/arp.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn operation(&self) -> ARPKind {
[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: `handle_packet`
[INFO] [stdout]    --> src/arp/arp.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn handle_packet(data: Vec<u8>, eth_addr: [u8; 6]) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_request`
[INFO] [stdout]    --> src/arp/arp.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn build_request(data: Vec<u8>) -> ARP {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hrd`
[INFO] [stdout]    --> src/arp/arp.rs:175:12
[INFO] [stdout]     |
[INFO] [stdout] 175 |     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:181:12
[INFO] [stdout]     |
[INFO] [stdout] 181 |     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:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stdout]     |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tha`
[INFO] [stdout]    --> src/arp/arp.rs:213:12
[INFO] [stdout]     |
[INFO] [stdout] 213 |     pub fn tha(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn value(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Reading`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     Reading,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `State` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ethernet/ethernet.rs:66:10
[INFO] [stdout]    |
[INFO] [stdout] 66 | #[derive(Clone, Copy)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_response_frame`
[INFO] [stdout]   --> src/ethernet/ethernet.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn build_response_frame<T>(&self, payload: T) -> Self
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src`
[INFO] [stdout]    --> src/ethernet/ethernet.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn src(&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:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `version`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     version: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ihl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     ihl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `t_len`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     t_len: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     id: u16,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flags`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     flags: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `frag_offset`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     frag_offset: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ttl`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     ttl: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chksm`
[INFO] [stdout]   --> src/ipv4/ipv4.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     chksm: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stdout]    |          ^^^^^  ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_str`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout] 189 |     pub fn src_str(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `src_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:254:12
[INFO] [stdout]     |
[INFO] [stdout] 254 |     pub fn src_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dst_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:258:12
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn dst_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `payload_from_bytes`
[INFO] [stdout]    --> src/ipv4/ipv4.rs:262:12
[INFO] [stdout]     |
[INFO] [stdout] 262 |     pub fn payload_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[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: associated function is never used: `dst_port`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn dst_port(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn length(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn chksm(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_chksm`
[INFO] [stdout]   --> src/ipv4/udp/udp.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn set_chksm(&mut self, value: u16) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `addr_identifier`
[INFO] [stdout]   --> src/ipv4/udp/udp_socket.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     addr_identifier: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/ethernet/ethernet.rs:288:28
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!(err.desc());
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 288 |                     panic!("{}", err.desc());
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 35 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.79s
[INFO] running `Command { std: "docker" "inspect" "b85e2b706031937785d15df1685554bdbc357846dfc2cdb1087ad8e8e6fc372f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b85e2b706031937785d15df1685554bdbc357846dfc2cdb1087ad8e8e6fc372f", kill_on_drop: false }`
[INFO] [stdout] b85e2b706031937785d15df1685554bdbc357846dfc2cdb1087ad8e8e6fc372f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a9494cf70aaf20c948672cc586cb9bc8b2b08a916502550d8d3496e3e5479bf5
[INFO] running `Command { std: "docker" "start" "-a" "a9494cf70aaf20c948672cc586cb9bc8b2b08a916502550d8d3496e3e5479bf5", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `time`
[INFO] [stderr]   --> src/ethernet/ethernet.rs:16:19
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::{thread, time};
[INFO] [stderr]    |                   ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `eth`
[INFO] [stderr]    --> src/ipv4/ipv4.rs:118:9
[INFO] [stderr]     |
[INFO] [stderr] 118 |         eth: &ethernet::Ethernet,
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_eth`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `layer_3_writer`
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:45:59
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn process_packet(frame: ethernet::EthernetFrame, layer_3_writer: &IPstackWriter) {
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_layer_3_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:49:18
[INFO] [stderr]    |
[INFO] [stderr] 49 |             Some(mut datagram) => {
[INFO] [stderr]    |                  ----^^^^^^^^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `htons`
[INFO] [stderr]   --> src/net_util.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn htons(input: &[u8]) -> u16 {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `operation`
[INFO] [stderr]   --> src/arp/arp.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 |     fn operation(&self) -> ARPKind {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `handle_packet`
[INFO] [stderr]    --> src/arp/arp.rs:110:8
[INFO] [stderr]     |
[INFO] [stderr] 110 |     fn handle_packet(data: Vec<u8>, eth_addr: [u8; 6]) -> ARP {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_request`
[INFO] [stderr]    --> src/arp/arp.rs:115:8
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn build_request(data: Vec<u8>) -> ARP {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `hrd`
[INFO] [stderr]    --> src/arp/arp.rs:175:12
[INFO] [stderr]     |
[INFO] [stderr] 175 |     pub fn hrd(&self) -> [u8; 2] {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pro`
[INFO] [stderr]    --> src/arp/arp.rs:181:12
[INFO] [stderr]     |
[INFO] [stderr] 181 |     pub fn pro(&self) -> [u8; 2] {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `op`
[INFO] [stderr]    --> src/arp/arp.rs:199:12
[INFO] [stderr]     |
[INFO] [stderr] 199 |     pub fn op(&self) -> [u8; 2] {
[INFO] [stderr]     |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `tha`
[INFO] [stderr]    --> src/arp/arp.rs:213:12
[INFO] [stderr]     |
[INFO] [stderr] 213 |     pub fn tha(&self) -> &[u8] {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/ethernet/ethernet.rs:55:12
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn value(&self) -> u16 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Reading`
[INFO] [stderr]   --> src/ethernet/ethernet.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     Reading,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `State` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ethernet/ethernet.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | #[derive(Clone, Copy)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_response_frame`
[INFO] [stderr]   --> src/ethernet/ethernet.rs:95:12
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn build_response_frame<T>(&self, payload: T) -> Self
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `src`
[INFO] [stderr]    --> src/ethernet/ethernet.rs:112:12
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn src(&self) -> HwAddr {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_socket_state`
[INFO] [stderr]    --> src/ethernet/ethernet.rs:133:8
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn set_socket_state(&mut self, to_state: State) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `version`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     version: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ihl`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     ihl: u8,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `t_len`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     t_len: u16,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     id: u16,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `flags`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     flags: u8,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `frag_offset`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     frag_offset: u16,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ttl`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     ttl: u8,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `chksm`
[INFO] [stderr]   --> src/ipv4/ipv4.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     chksm: u16,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/ipv4/ipv4.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | #[derive(Debug, Clone, Copy)]
[INFO] [stderr]    |          ^^^^^  ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `src_str`
[INFO] [stderr]    --> src/ipv4/ipv4.rs:189:12
[INFO] [stderr]     |
[INFO] [stderr] 189 |     pub fn src_str(&self) -> String {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `src_from_bytes`
[INFO] [stderr]    --> src/ipv4/ipv4.rs:254:12
[INFO] [stderr]     |
[INFO] [stderr] 254 |     pub fn src_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dst_from_bytes`
[INFO] [stderr]    --> src/ipv4/ipv4.rs:258:12
[INFO] [stderr]     |
[INFO] [stderr] 258 |     pub fn dst_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `payload_from_bytes`
[INFO] [stderr]    --> src/ipv4/ipv4.rs:262:12
[INFO] [stderr]     |
[INFO] [stderr] 262 |     pub fn payload_from_bytes(ip_bytes: &[u8]) -> &[u8] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ECHO_REQ`
[INFO] [stderr]   --> src/ipv4/icmp/icmp.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const ECHO_REQ: u8 = 8u8;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dst_port`
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn dst_port(&self) -> u16 {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `length`
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn length(&self) -> u16 {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `chksm`
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn chksm(&self) -> u16 {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_chksm`
[INFO] [stderr]   --> src/ipv4/udp/udp.rs:39:12
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn set_chksm(&mut self, value: u16) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `addr_identifier`
[INFO] [stderr]   --> src/ipv4/udp/udp_socket.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     addr_identifier: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/ethernet/ethernet.rs:288:28
[INFO] [stderr]     |
[INFO] [stderr] 288 |                     panic!(err.desc());
[INFO] [stderr]     |                            ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]     |
[INFO] [stderr] 288 |                     panic!("{}", err.desc());
[INFO] [stderr]     |                            +++++
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `operation`
[INFO] [stderr]   --> src/arp/arp.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 |     fn operation(&self) -> ARPKind {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `user_net` (lib) generated 36 warnings
[INFO] [stderr] warning: `user_net` (lib test) generated 35 warnings (34 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/user_net-4981f2e39c0a0ae2)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test ethernet::ethernet::test::test_ether_type ... ok
[INFO] [stdout] test net_util::test::test_htons ... ok
[INFO] [stdout] test net_util::test::test_ntohs ... ok
[INFO] [stdout] test net_util::test::test_compute_ip_checksum ... ok
[INFO] [stdout] test net_util::test::test_get_bits ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/user_net-a1209fc1c0ed06bf)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests user_net
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a9494cf70aaf20c948672cc586cb9bc8b2b08a916502550d8d3496e3e5479bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9494cf70aaf20c948672cc586cb9bc8b2b08a916502550d8d3496e3e5479bf5", kill_on_drop: false }`
[INFO] [stdout] a9494cf70aaf20c948672cc586cb9bc8b2b08a916502550d8d3496e3e5479bf5