[INFO] updating cached repository https://github.com/s5003597/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] 651ca6e5bb8a4640539d894c7f1a7ee064939cd2
[INFO] testing s5003597/rDNS against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fs5003597%2FrDNS" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/s5003597/rDNS on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/s5003597/rDNS
[INFO] finished tweaking git repo https://github.com/s5003597/rDNS
[INFO] tweaked toml for git repo https://github.com/s5003597/rDNS written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/s5003597/rDNS already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1d4284a0502d51a2f543337810ad49c74fec2d3cc513a3309c48c60c6528e50f
[INFO] running `"docker" "start" "-a" "1d4284a0502d51a2f543337810ad49c74fec2d3cc513a3309c48c60c6528e50f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rdns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:38
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                      ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:44
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                            ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:49
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                 ^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:55
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:69
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:78
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:42
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:49
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:42
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:49
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:76:69
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn read_qname(&mut self, outstr: &mut String) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:129:52
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn write(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:138:55
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn write_u8(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:143:57
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn write_u16(&mut self, val: u16) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:150:57
[INFO] [stderr]     |
[INFO] [stderr] 150 |     pub fn write_u32(&mut self, val: u32) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:159:62
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn write_qname(&mut self, qname: &str) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:49:73
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:76:70
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:65
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:78
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:63:74
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:19:73
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:27:74
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:58
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:71
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:66
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:75
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:73
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:86
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:62
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:75
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/main.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn test_2() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 32 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.00s
[INFO] running `"docker" "inspect" "1d4284a0502d51a2f543337810ad49c74fec2d3cc513a3309c48c60c6528e50f"`
[INFO] running `"docker" "rm" "-f" "1d4284a0502d51a2f543337810ad49c74fec2d3cc513a3309c48c60c6528e50f"`
[INFO] [stdout] 1d4284a0502d51a2f543337810ad49c74fec2d3cc513a3309c48c60c6528e50f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f85d36808cd15bddd7564fafcd8f7c3a63a33991243b75ac4901a68a7943780a
[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" "f85d36808cd15bddd7564fafcd8f7c3a63a33991243b75ac4901a68a7943780a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rdns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:38
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                      ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:44
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                            ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:49
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                 ^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:55
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:69
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:78
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:42
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:49
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:42
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:49
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:76:69
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn read_qname(&mut self, outstr: &mut String) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:129:52
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn write(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:138:55
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn write_u8(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:143:57
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn write_u16(&mut self, val: u16) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:150:57
[INFO] [stderr]     |
[INFO] [stderr] 150 |     pub fn write_u32(&mut self, val: u32) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:159:62
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn write_qname(&mut self, qname: &str) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:49:73
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:76:70
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:65
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:78
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:63:74
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:19:73
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:27:74
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:58
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:71
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:66
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:75
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:73
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:86
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:62
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:75
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/main.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn test_2() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 32 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "f85d36808cd15bddd7564fafcd8f7c3a63a33991243b75ac4901a68a7943780a"`
[INFO] running `"docker" "rm" "-f" "f85d36808cd15bddd7564fafcd8f7c3a63a33991243b75ac4901a68a7943780a"`
[INFO] [stdout] f85d36808cd15bddd7564fafcd8f7c3a63a33991243b75ac4901a68a7943780a
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e0cf8c6012b14872754e49c7a27c56683e49553879c00235d561e8749053900
[INFO] running `"docker" "start" "-a" "7e0cf8c6012b14872754e49c7a27c56683e49553879c00235d561e8749053900"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:38
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                      ^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:36:44
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn read(&mut self) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                            ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:49
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                 ^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:48:55
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn get(&mut self, pos: usize) -> Result<(u8), (Error)> {
[INFO] [stderr]    |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:69
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:55:78
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_range(&mut self, start: usize, len: usize) -> Result<(&[u8]), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:42
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:63:49
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn read_u16(&mut self) -> Result<(u16), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:42
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                          ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:67:49
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn read_u32(&mut self) -> Result<(u32), (Error)> {
[INFO] [stderr]    |                                                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/bytepacketbuffer.rs:76:69
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn read_qname(&mut self, outstr: &mut String) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                     ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:129:52
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn write(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:138:55
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn write_u8(&mut self, val: u8) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:143:57
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn write_u16(&mut self, val: u16) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:150:57
[INFO] [stderr]     |
[INFO] [stderr] 150 |     pub fn write_u32(&mut self, val: u32) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/bytepacketbuffer.rs:159:62
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn write_qname(&mut self, qname: &str) -> Result<(), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:49:73
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/header.rs:76:70
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:65
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:35:78
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from_buffer(buffer: &mut BytePacketBuffer) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                              ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/dns_packet.rs:63:74
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:19:73
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn read(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/questions.rs:27:74
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn write(&mut self, buffer: &mut BytePacketBuffer) -> Result<(), (Error)> {
[INFO] [stderr]    |                                                                          ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:58
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/record.rs:49:71
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn read(buffer: &mut BytePacketBuffer) -> Result<(DnsRecord), (Error)> {
[INFO] [stderr]    |                                                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:66
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/record.rs:141:75
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn write(&self, buffer: &mut BytePacketBuffer) -> Result<(usize), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:73
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:25:86
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn lookup(qname: &str, qtype: QueryType, server: (&str, u16)) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]    |                                                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:62
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                              ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:105:75
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn recursive_lookup(qname: &str, qtype: QueryType) -> Result<(DnsPacket), (Error)> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_2`
[INFO] [stderr]   --> src/main.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn test_2() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 32 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rdns-1ca937dd2fef0e72
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7e0cf8c6012b14872754e49c7a27c56683e49553879c00235d561e8749053900"`
[INFO] running `"docker" "rm" "-f" "7e0cf8c6012b14872754e49c7a27c56683e49553879c00235d561e8749053900"`
[INFO] [stdout] 7e0cf8c6012b14872754e49c7a27c56683e49553879c00235d561e8749053900