[INFO] updating cached repository https://github.com/MAKLs/rdns
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a6dc91f628fccde02f4ccfcff5d7c10671d7482
[INFO] checking MAKLs/rdns against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMAKLs%2Frdns" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MAKLs/rdns on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/MAKLs/rdns
[INFO] finished tweaking git repo https://github.com/MAKLs/rdns
[INFO] tweaked toml for git repo https://github.com/MAKLs/rdns written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/MAKLs/rdns already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d9a47ed5c16d64bd01cc79c40210fb1a49b3f61434222d4443ea11ca2e98d1cc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d9a47ed5c16d64bd01cc79c40210fb1a49b3f61434222d4443ea11ca2e98d1cc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rdns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `ExtendingBuffer`
[INFO] [stderr]  --> src/dns/network.rs:1:51
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::buffer::{ByteBuffer, BytePacketBuffer, ExtendingBuffer, VariableBuffer};
[INFO] [stderr]   |                                                   ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/dns/network.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stderr]   |               ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExtendingBuffer`
[INFO] [stderr]  --> src/dns/network.rs:1:51
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::buffer::{ByteBuffer, BytePacketBuffer, ExtendingBuffer, VariableBuffer};
[INFO] [stderr]   |                                                   ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ErrorKind`, `Error`
[INFO] [stderr]  --> src/dns/network.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stderr]   |               ^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `recursive`
[INFO] [stderr]   --> src/dns/resolver.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn resolve(&self, qname: &str, qtype: QueryType, recursive: bool) -> Result<DnsPacket> {
[INFO] [stderr]    |                                                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recursive`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `recursive`
[INFO] [stderr]   --> src/dns/resolver.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn resolve(&self, qname: &str, qtype: QueryType, recursive: bool) -> Result<DnsPacket> {
[INFO] [stderr]    |                                                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recursive`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/dns/server.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/dns/server.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.37s
[INFO] running `"docker" "inspect" "d9a47ed5c16d64bd01cc79c40210fb1a49b3f61434222d4443ea11ca2e98d1cc"`
[INFO] running `"docker" "rm" "-f" "d9a47ed5c16d64bd01cc79c40210fb1a49b3f61434222d4443ea11ca2e98d1cc"`
[INFO] [stdout] d9a47ed5c16d64bd01cc79c40210fb1a49b3f61434222d4443ea11ca2e98d1cc