[INFO] cloning repository https://github.com/m-aamir95/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/m-aamir95/Port-Scanner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-aamir95%2FPort-Scanner", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-aamir95%2FPort-Scanner'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 13cfe51f6441bf74d72a093c923720ef2dc3a91b
[INFO] checking m-aamir95/Port-Scanner against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-aamir95%2FPort-Scanner" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/m-aamir95/Port-Scanner
[INFO] finished tweaking git repo https://github.com/m-aamir95/Port-Scanner
[INFO] tweaked toml for git repo https://github.com/m-aamir95/Port-Scanner written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/m-aamir95/Port-Scanner on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/m-aamir95/Port-Scanner 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9378df83c967500e0df8a4e659c680686010ced3aef6471811965dd4cb22418d
[INFO] running `Command { std: "docker" "start" "-a" "9378df83c967500e0df8a4e659c680686010ced3aef6471811965dd4cb22418d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9378df83c967500e0df8a4e659c680686010ced3aef6471811965dd4cb22418d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9378df83c967500e0df8a4e659c680686010ced3aef6471811965dd4cb22418d", kill_on_drop: false }`
[INFO] [stdout] 9378df83c967500e0df8a4e659c680686010ced3aef6471811965dd4cb22418d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1cd48631ff38742031c33c6beb38053ef3f80c7b355620eac42d40fed6610f5a
[INFO] running `Command { std: "docker" "start" "-a" "1cd48631ff38742031c33c6beb38053ef3f80c7b355620eac42d40fed6610f5a", kill_on_drop: false }`
[INFO] [stderr]     Checking Port-Scanner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `channel`
[INFO] [stdout]   --> src/main.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::sync::mpsc::{Sender, channel};
[INFO] [stdout]    |                       ^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::thread;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         _ => {process::exit(0)}
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         Ok(args) => {
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 26 |         Err(err) => {
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 32 |         _ => {process::exit(0)}
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `flag` is never read
[INFO] [stdout]  --> src/cli_args_parser.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Arguments {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub flag : String
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Arguments` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:15:24
[INFO] [stdout]    |
[INFO] [stdout] 15 |             return Err("too few arguments, IP address is mandatory".parse().unwrap());
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:20:24
[INFO] [stdout]    |
[INFO] [stdout] 20 |             return Err("too many arguments please see help e.g, -h".parse().unwrap());
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:43:33
[INFO] [stdout]    |
[INFO] [stdout] 43 | ...                   Err("Not a valid IP address".parse().unwrap())
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |                         Err("Not a valid num jobs/threads".parse().unwrap())
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:50:25
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     Err("Please specify Number of Jobs and IP address".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |                     Err("no_error".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     Err("no_error".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `channel`
[INFO] [stdout]   --> src/main.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::sync::mpsc::{Sender, channel};
[INFO] [stdout]    |                       ^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::thread;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Port-Scanner` (bin "Port-Scanner") due to 7 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         _ => {process::exit(0)}
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         Ok(args) => {
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 26 |         Err(err) => {
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 32 |         _ => {process::exit(0)}
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `flag` is never read
[INFO] [stdout]  --> src/cli_args_parser.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Arguments {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub flag : String
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Arguments` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:15:24
[INFO] [stdout]    |
[INFO] [stdout] 15 |             return Err("too few arguments, IP address is mandatory".parse().unwrap());
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:20:24
[INFO] [stdout]    |
[INFO] [stdout] 20 |             return Err("too many arguments please see help e.g, -h".parse().unwrap());
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:43:33
[INFO] [stdout]    |
[INFO] [stdout] 43 | ...                   Err("Not a valid IP address".parse().unwrap())
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |                         Err("Not a valid num jobs/threads".parse().unwrap())
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:50:25
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     Err("Please specify Number of Jobs and IP address".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |                     Err("no_error".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli_args_parser.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     Err("no_error".parse().unwrap())
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Port-Scanner` (bin "Port-Scanner" test) due to 7 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1cd48631ff38742031c33c6beb38053ef3f80c7b355620eac42d40fed6610f5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cd48631ff38742031c33c6beb38053ef3f80c7b355620eac42d40fed6610f5a", kill_on_drop: false }`
[INFO] [stdout] 1cd48631ff38742031c33c6beb38053ef3f80c7b355620eac42d40fed6610f5a
