[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] checking sammhicks/rust-ping against master#6d05c430d2f0573bf98320bb1d2457a72ea1e67f for pr-116607
[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 6d05c430d2f0573bf98320bb1d2457a72ea1e67f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6d05c430d2f0573bf98320bb1d2457a72ea1e67f" "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" "+6d05c430d2f0573bf98320bb1d2457a72ea1e67f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pnet_macros_support v0.26.0
[INFO] [stderr]   Downloaded pnet_base v0.26.0
[INFO] [stderr]   Downloaded pnet_packet v0.26.0
[INFO] [stderr]   Downloaded pnet v0.26.0
[INFO] [stderr]   Downloaded pnet_transport v0.26.0
[INFO] [stderr]   Downloaded pnet_datalink v0.26.0
[INFO] [stderr]   Downloaded pnet_sys v0.26.0
[INFO] [stderr]   Downloaded pnet_macros v0.26.0
[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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+6d05c430d2f0573bf98320bb1d2457a72ea1e67f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7848d54c07c53e4e3e817fa950c119360848b6e57de754f2aab5cdd8e3625fa
[INFO] running `Command { std: "docker" "start" "-a" "e7848d54c07c53e4e3e817fa950c119360848b6e57de754f2aab5cdd8e3625fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7848d54c07c53e4e3e817fa950c119360848b6e57de754f2aab5cdd8e3625fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7848d54c07c53e4e3e817fa950c119360848b6e57de754f2aab5cdd8e3625fa", kill_on_drop: false }`
[INFO] [stdout] e7848d54c07c53e4e3e817fa950c119360848b6e57de754f2aab5cdd8e3625fa
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+6d05c430d2f0573bf98320bb1d2457a72ea1e67f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94e47c095efdb863b6a79c7fa3085936d5b017585dbf8e057c977f418a32a83e
[INFO] running `Command { std: "docker" "start" "-a" "94e47c095efdb863b6a79c7fa3085936d5b017585dbf8e057c977f418a32a83e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking pnet_base v0.26.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling pnet v0.26.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]     Checking pnet_macros_support v0.26.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]     Checking pnet_sys v0.26.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking 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]     Checking ipnetwork v0.16.0
[INFO] [stderr]     Checking 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]     Checking pnet_transport v0.26.0
[INFO] [stderr]     Checking 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] [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 10.30s
[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" "94e47c095efdb863b6a79c7fa3085936d5b017585dbf8e057c977f418a32a83e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94e47c095efdb863b6a79c7fa3085936d5b017585dbf8e057c977f418a32a83e", kill_on_drop: false }`
[INFO] [stdout] 94e47c095efdb863b6a79c7fa3085936d5b017585dbf8e057c977f418a32a83e