[INFO] cloning repository https://github.com/Jack-Sim/rust_port_scanner
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jack-Sim/rust_port_scanner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJack-Sim%2Frust_port_scanner", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJack-Sim%2Frust_port_scanner'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0109d5c98a3330521b3ec49a4d3dd4e393994b2
[INFO] checking Jack-Sim/rust_port_scanner against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJack-Sim%2Frust_port_scanner" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jack-Sim/rust_port_scanner on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jack-Sim/rust_port_scanner
[INFO] finished tweaking git repo https://github.com/Jack-Sim/rust_port_scanner
[INFO] tweaked toml for git repo https://github.com/Jack-Sim/rust_port_scanner written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Jack-Sim/rust_port_scanner already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 72b9d36232e63eee823ce74b26d544380391fc6b9b4b0410489468f34a57fe3d
[INFO] running `Command { std: "docker" "start" "-a" "72b9d36232e63eee823ce74b26d544380391fc6b9b4b0410489468f34a57fe3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72b9d36232e63eee823ce74b26d544380391fc6b9b4b0410489468f34a57fe3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72b9d36232e63eee823ce74b26d544380391fc6b9b4b0410489468f34a57fe3d", kill_on_drop: false }`
[INFO] [stdout] 72b9d36232e63eee823ce74b26d544380391fc6b9b4b0410489468f34a57fe3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7422cae7ffca98f8f4c6290f82b1601bf0f4f83d2ec5355ca556c5638289344e
[INFO] running `Command { std: "docker" "start" "-a" "7422cae7ffca98f8f4c6290f82b1601bf0f4f83d2ec5355ca556c5638289344e", kill_on_drop: false }`
[INFO] [stderr]     Checking ip_sniffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]   --> src/main.rs:96:29
[INFO] [stdout]    |
[INFO] [stdout] 96 |                         let threads = match args[2].parse::<u16>(){
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]    --> src/main.rs:102:29
[INFO] [stdout]     |
[INFO] [stdout] 102 |                         let threads = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ports`
[INFO] [stdout]    --> src/main.rs:108:29
[INFO] [stdout]     |
[INFO] [stdout] 108 |                         let ports = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_ports`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ports`
[INFO] [stdout]    --> src/main.rs:114:29
[INFO] [stdout]     |
[INFO] [stdout] 114 |                         let ports = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_ports`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:85:21
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let mut valid_flags: [String; 4] = ["-j".to_string(), "-threads".to_string(), "-p".to_string(), "-ports".to_string()];
[INFO] [stdout]    |                     ----^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]   --> src/main.rs:96:29
[INFO] [stdout]    |
[INFO] [stdout] 96 |                         let threads = match args[2].parse::<u16>(){
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `threads`
[INFO] [stdout]    --> src/main.rs:102:29
[INFO] [stdout]     |
[INFO] [stdout] 102 |                         let threads = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_threads`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ports`
[INFO] [stdout]    --> src/main.rs:108:29
[INFO] [stdout]     |
[INFO] [stdout] 108 |                         let ports = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_ports`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ports`
[INFO] [stdout]    --> src/main.rs:114:29
[INFO] [stdout]     |
[INFO] [stdout] 114 |                         let ports = match args[2].parse::<u16>(){
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_ports`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flag1`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     flag1: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flag2`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     flag2: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:85:21
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 let mut valid_flags: [String; 4] = ["-j".to_string(), "-threads".to_string(), "-p".to_string(), "-ports".to_string()];
[INFO] [stdout]    |                     ----^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flag1`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     flag1: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `flag2`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     flag2: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "7422cae7ffca98f8f4c6290f82b1601bf0f4f83d2ec5355ca556c5638289344e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7422cae7ffca98f8f4c6290f82b1601bf0f4f83d2ec5355ca556c5638289344e", kill_on_drop: false }`
[INFO] [stdout] 7422cae7ffca98f8f4c6290f82b1601bf0f4f83d2ec5355ca556c5638289344e