[INFO] cloning repository https://github.com/sammhicks/rust-ping
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sammhicks/rust-ping" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammhicks%2Frust-ping", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammhicks%2Frust-ping'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f1bbbb6aee8394a305915678ff94f10df9489f8
[INFO] testing sammhicks/rust-ping against 1.75.0 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammhicks%2Frust-ping" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sammhicks/rust-ping on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sammhicks/rust-ping
[INFO] finished tweaking git repo https://github.com/sammhicks/rust-ping
[INFO] tweaked toml for git repo https://github.com/sammhicks/rust-ping written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sammhicks/rust-ping 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.32
[INFO] [stderr]   Downloaded serde v1.0.115
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b619fa8707b81adf08b11322d32a3d9205d0dc9627c7c76c96b48a19cb79fe30
[INFO] running `Command { std: "docker" "start" "-a" "b619fa8707b81adf08b11322d32a3d9205d0dc9627c7c76c96b48a19cb79fe30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b619fa8707b81adf08b11322d32a3d9205d0dc9627c7c76c96b48a19cb79fe30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b619fa8707b81adf08b11322d32a3d9205d0dc9627c7c76c96b48a19cb79fe30", kill_on_drop: false }`
[INFO] [stdout] b619fa8707b81adf08b11322d32a3d9205d0dc9627c7c76c96b48a19cb79fe30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4cbc8ff84f20eb9ab5cf1c8fd0a779ea3d9214e534e7a7579835393f2f62b76a
[INFO] running `Command { std: "docker" "start" "-a" "4cbc8ff84f20eb9ab5cf1c8fd0a779ea3d9214e534e7a7579835393f2f62b76a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling pnet_base v0.26.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling pnet v0.26.0
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling pnet_macros_support v0.26.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling pnet_sys v0.26.0
[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 syntex_pos v0.42.0
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]    Compiling ipnetwork v0.16.0
[INFO] [stderr]    Compiling pnet_datalink v0.26.0
[INFO] [stderr]    Compiling syntex v0.42.2
[INFO] [stderr]    Compiling pnet_macros v0.26.0
[INFO] [stderr]    Compiling pnet_packet v0.26.0
[INFO] [stderr]    Compiling pnet_transport v0.26.0
[INFO] [stderr]    Compiling rust-ping v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `addr` and `io_error` are never read
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     DnsLookupError {
[INFO] [stdout]    |     -------------- fields in this variant
[INFO] [stdout] 26 |         addr: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 27 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     FailedtoSendIPV4 {
[INFO] [stdout]    |     ---------------- field in this variant
[INFO] [stdout] 31 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     ErrorWhileWaitingForIPV4 {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 34 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_type` is never read
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     IgnoringIPV4PacketOfType {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 39 |         icmp_type: pnet::packet::icmp::IcmpType,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_code` is never read
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     IgnoringIPV4PacketWithInvalidICMP {
[INFO] [stdout]    |     --------------------------------- field in this variant
[INFO] [stdout] 42 |         icmp_code: pnet::packet::icmp::IcmpCode,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     FailedtoSendIPV6 {
[INFO] [stdout]    |     ---------------- field in this variant
[INFO] [stdout] 46 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     ErrorWhileWaitingForIPV6 {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 51 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_type` is never read
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     IgnoringIPV6PacketOfType {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 55 |         icmp_type: pnet::packet::icmpv6::Icmpv6Type,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `FailedToGetIPV6RequestPacket` is never constructed
[INFO] [stdout]   --> src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum PingError {
[INFO] [stdout]    |      --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 48 |     FailedToGetIPV6RequestPacket,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PingError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.29s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "4cbc8ff84f20eb9ab5cf1c8fd0a779ea3d9214e534e7a7579835393f2f62b76a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cbc8ff84f20eb9ab5cf1c8fd0a779ea3d9214e534e7a7579835393f2f62b76a", kill_on_drop: false }`
[INFO] [stdout] 4cbc8ff84f20eb9ab5cf1c8fd0a779ea3d9214e534e7a7579835393f2f62b76a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 794bd6a48fd4bcce5451fba7f1b84908234fd62d8c47cde93ad78a5f9276e47b
[INFO] running `Command { std: "docker" "start" "-a" "794bd6a48fd4bcce5451fba7f1b84908234fd62d8c47cde93ad78a5f9276e47b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-ping v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `addr` and `io_error` are never read
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     DnsLookupError {
[INFO] [stdout]    |     -------------- fields in this variant
[INFO] [stdout] 26 |         addr: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 27 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     FailedtoSendIPV4 {
[INFO] [stdout]    |     ---------------- field in this variant
[INFO] [stdout] 31 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     ErrorWhileWaitingForIPV4 {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 34 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_type` is never read
[INFO] [stdout]   --> src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     IgnoringIPV4PacketOfType {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 39 |         icmp_type: pnet::packet::icmp::IcmpType,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_code` is never read
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     IgnoringIPV4PacketWithInvalidICMP {
[INFO] [stdout]    |     --------------------------------- field in this variant
[INFO] [stdout] 42 |         icmp_code: pnet::packet::icmp::IcmpCode,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     FailedtoSendIPV6 {
[INFO] [stdout]    |     ---------------- field in this variant
[INFO] [stdout] 46 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `io_error` is never read
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     ErrorWhileWaitingForIPV6 {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 51 |         io_error: std::io::Error,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `icmp_type` is never read
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     IgnoringIPV6PacketOfType {
[INFO] [stdout]    |     ------------------------ field in this variant
[INFO] [stdout] 55 |         icmp_type: pnet::packet::icmpv6::Icmpv6Type,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `FailedToGetIPV6RequestPacket` is never constructed
[INFO] [stdout]   --> src/main.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum PingError {
[INFO] [stdout]    |      --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 48 |     FailedToGetIPV6RequestPacket,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PingError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "794bd6a48fd4bcce5451fba7f1b84908234fd62d8c47cde93ad78a5f9276e47b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "794bd6a48fd4bcce5451fba7f1b84908234fd62d8c47cde93ad78a5f9276e47b", kill_on_drop: false }`
[INFO] [stdout] 794bd6a48fd4bcce5451fba7f1b84908234fd62d8c47cde93ad78a5f9276e47b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a8d8053736f3f3df81ee3642d983cc0614909ea2427ad7644d47de0e5d89b3a4
[INFO] running `Command { std: "docker" "start" "-a" "a8d8053736f3f3df81ee3642d983cc0614909ea2427ad7644d47de0e5d89b3a4", kill_on_drop: false }`
[INFO] [stderr] warning: fields `addr` and `io_error` are never read
[INFO] [stderr]   --> src/main.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     DnsLookupError {
[INFO] [stderr]    |     -------------- fields in this variant
[INFO] [stderr] 26 |         addr: String,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 27 |         io_error: std::io::Error,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `io_error` is never read
[INFO] [stderr]   --> src/main.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     FailedtoSendIPV4 {
[INFO] [stderr]    |     ---------------- field in this variant
[INFO] [stderr] 31 |         io_error: std::io::Error,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `io_error` is never read
[INFO] [stderr]   --> src/main.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     ErrorWhileWaitingForIPV4 {
[INFO] [stderr]    |     ------------------------ field in this variant
[INFO] [stderr] 34 |         io_error: std::io::Error,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `icmp_type` is never read
[INFO] [stderr]   --> src/main.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     IgnoringIPV4PacketOfType {
[INFO] [stderr]    |     ------------------------ field in this variant
[INFO] [stderr] 39 |         icmp_type: pnet::packet::icmp::IcmpType,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `icmp_code` is never read
[INFO] [stderr]   --> src/main.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     IgnoringIPV4PacketWithInvalidICMP {
[INFO] [stderr]    |     --------------------------------- field in this variant
[INFO] [stderr] 42 |         icmp_code: pnet::packet::icmp::IcmpCode,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `io_error` is never read
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     FailedtoSendIPV6 {
[INFO] [stderr]    |     ---------------- field in this variant
[INFO] [stderr] 46 |         io_error: std::io::Error,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `io_error` is never read
[INFO] [stderr]   --> src/main.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     ErrorWhileWaitingForIPV6 {
[INFO] [stderr]    |     ------------------------ field in this variant
[INFO] [stderr] 51 |         io_error: std::io::Error,
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `icmp_type` is never read
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     IgnoringIPV6PacketOfType {
[INFO] [stderr]    |     ------------------------ field in this variant
[INFO] [stderr] 55 |         icmp_type: pnet::packet::icmpv6::Icmpv6Type,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `FailedToGetIPV6RequestPacket` is never constructed
[INFO] [stderr]   --> src/main.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | enum PingError {
[INFO] [stderr]    |      --------- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 48 |     FailedToGetIPV6RequestPacket,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PingError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-ping` (bin "rust-ping" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_ping-3dae9620e2592768)
[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" "a8d8053736f3f3df81ee3642d983cc0614909ea2427ad7644d47de0e5d89b3a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8d8053736f3f3df81ee3642d983cc0614909ea2427ad7644d47de0e5d89b3a4", kill_on_drop: false }`
[INFO] [stdout] a8d8053736f3f3df81ee3642d983cc0614909ea2427ad7644d47de0e5d89b3a4