[INFO] cloning repository https://github.com/TylerStanish/dns
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TylerStanish/dns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f092de5910c089b57da519de9f19925a255fba6e
[INFO] checking TylerStanish/dns against try#879b8cb7dc2ad9102994457e73cf78d124926ea5 for pr-73084
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTylerStanish%2Fdns" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TylerStanish/dns on toolchain 879b8cb7dc2ad9102994457e73cf78d124926ea5
[INFO] running `"/workspace/cargo-home/bin/cargo" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/TylerStanish/dns
[INFO] finished tweaking git repo https://github.com/TylerStanish/dns
[INFO] tweaked toml for git repo https://github.com/TylerStanish/dns written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/TylerStanish/dns already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5051bd0cfc4b7abbf56a492ce9db9cada7d174d7b15d1cb2f119b80505e98903
[INFO] running `"docker" "start" "-a" "5051bd0cfc4b7abbf56a492ce9db9cada7d174d7b15d1cb2f119b80505e98903"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling uninitialized v0.0.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking resize-slice v0.1.3
[INFO] [stderr]     Checking dns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `flags` is never read
[INFO] [stderr]   --> src/header.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut flags = 0u16;
[INFO] [stderr]    |             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cache`
[INFO] [stderr]   --> src/packet.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn standard_query(&self, cache: HashMap<String, String>) -> Self {
[INFO] [stderr]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_cache`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/answer.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lookup`
[INFO] [stderr]  --> src/client.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn lookup(host: &str, req: DnsPacket) -> DnsPacket {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/query.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `flags` is never read
[INFO] [stderr]   --> src/header.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let mut flags = 0u16;
[INFO] [stderr]    |             ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cache`
[INFO] [stderr]   --> src/packet.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn standard_query(&self, cache: HashMap<String, String>) -> Self {
[INFO] [stderr]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_cache`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `lookup`
[INFO] [stderr]  --> src/client.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn lookup(host: &str, req: DnsPacket) -> DnsPacket {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_packet_to_bytes`
[INFO] [stderr]    --> src/packet.rs:156:8
[INFO] [stderr]     |
[INFO] [stderr] 156 |     fn test_packet_to_bytes() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `"docker" "inspect" "5051bd0cfc4b7abbf56a492ce9db9cada7d174d7b15d1cb2f119b80505e98903"`
[INFO] running `"docker" "rm" "-f" "5051bd0cfc4b7abbf56a492ce9db9cada7d174d7b15d1cb2f119b80505e98903"`
[INFO] [stdout] 5051bd0cfc4b7abbf56a492ce9db9cada7d174d7b15d1cb2f119b80505e98903