[INFO] cloning repository https://github.com/Knight-Ops/tftp-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Knight-Ops/tftp-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Ftftp-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Ftftp-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64117b7c7264eba95f755e3b99d0e5f911cc1c63
[INFO] checking Knight-Ops/tftp-rs against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKnight-Ops%2Ftftp-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Knight-Ops/tftp-rs on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Knight-Ops/tftp-rs
[INFO] finished tweaking git repo https://github.com/Knight-Ops/tftp-rs
[INFO] tweaked toml for git repo https://github.com/Knight-Ops/tftp-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Knight-Ops/tftp-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2bdbe36fe4e6db578b8be88d8f1a84c1ad622a4fb833317536225f1cc87cd87
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c2bdbe36fe4e6db578b8be88d8f1a84c1ad622a4fb833317536225f1cc87cd87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2bdbe36fe4e6db578b8be88d8f1a84c1ad622a4fb833317536225f1cc87cd87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2bdbe36fe4e6db578b8be88d8f1a84c1ad622a4fb833317536225f1cc87cd87", kill_on_drop: false }`
[INFO] [stdout] c2bdbe36fe4e6db578b8be88d8f1a84c1ad622a4fb833317536225f1cc87cd87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f629bef6202ba8a67389d6aae6fec5ff81dd67102fb661bec8cce908092003f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7f629bef6202ba8a67389d6aae6fec5ff81dd67102fb661bec8cce908092003f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking logging-allocator v0.1.1
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]     Checking tftp-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `unreachable`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     unreachable,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `unreachable`
[INFO] [stdout]  --> src/lib.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     unreachable,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | /         match opcode {
[INFO] [stdout] 44 | |             OpCode::ReadRequest => {
[INFO] [stdout] 45 | |                 run_guarded(|| info!("Opcode : {:?}", opcode));
[INFO] [stdout] 46 | |                 return Ok(Self::ReadRequest(ReadRequestPacket::try_from(&input[2..])?));
[INFO] [stdout] ...  |
[INFO] [stdout] 65 | |             }
[INFO] [stdout] 66 | |         }
[INFO] [stdout]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 67 | 
[INFO] [stdout] 68 |           Err(ParsingError::NotEnoughData)
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 43 | /         match opcode {
[INFO] [stdout] 44 | |             OpCode::ReadRequest => {
[INFO] [stdout] 45 | |                 run_guarded(|| info!("Opcode : {:?}", opcode));
[INFO] [stdout] 46 | |                 return Ok(Self::ReadRequest(ReadRequestPacket::try_from(&input[2..])?));
[INFO] [stdout] ...  |
[INFO] [stdout] 65 | |             }
[INFO] [stdout] 66 | |         }
[INFO] [stdout]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 67 | 
[INFO] [stdout] 68 |           Err(ParsingError::NotEnoughData)
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tmp_socket`
[INFO] [stdout]    --> src/lib.rs:503:13
[INFO] [stdout]     |
[INFO] [stdout] 503 |         let tmp_socket = UdpSocket::bind("localhost:0").map_err(|_| ParsingError::SocketError)?;
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tmp_socket`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dst`
[INFO] [stdout]    --> src/lib.rs:499:9
[INFO] [stdout]     |
[INFO] [stdout] 499 |         dst: SocketAddr,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_dst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wrq`
[INFO] [stdout]    --> src/lib.rs:500:9
[INFO] [stdout]     |
[INFO] [stdout] 500 |         wrq: WriteRequestPacket,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_wrq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tmp_socket`
[INFO] [stdout]    --> src/lib.rs:503:13
[INFO] [stdout]     |
[INFO] [stdout] 503 |         let tmp_socket = UdpSocket::bind("localhost:0").map_err(|_| ParsingError::SocketError)?;
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tmp_socket`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dst`
[INFO] [stdout]    --> src/lib.rs:499:9
[INFO] [stdout]     |
[INFO] [stdout] 499 |         dst: SocketAddr,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_dst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wrq`
[INFO] [stdout]    --> src/lib.rs:500:9
[INFO] [stdout]     |
[INFO] [stdout] 500 |         wrq: WriteRequestPacket,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_wrq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:166:8
[INFO] [stdout]     |
[INFO] [stdout] 166 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:264:8
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:166:8
[INFO] [stdout]     |
[INFO] [stdout] 166 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/lib.rs:264:8
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn serialize(&self) -> (usize, [u8; BUFFER_SIZE]) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:429:13
[INFO] [stdout]     |
[INFO] [stdout] 429 |             self.send_error(&tmp_socket, &dst, ErrorCode::FileNotFound);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |         s.send_to(&buf[0..size], dst);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:429:13
[INFO] [stdout]     |
[INFO] [stdout] 429 |             self.send_error(&tmp_socket, &dst, ErrorCode::FileNotFound);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |         s.send_to(&buf[0..size], dst);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     loop {
[INFO] [stdout] 18 | |         let mut buf = [0; 4096];
[INFO] [stdout] 19 | |         let (_, src) = socket.recv_from(&mut buf)?;
[INFO] [stdout] 20 | |
[INFO] [stdout] ...  |
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 48 | 
[INFO] [stdout] 49 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     loop {
[INFO] [stdout] 18 | |         let mut buf = [0; 4096];
[INFO] [stdout] 19 | |         let (_, src) = socket.recv_from(&mut buf)?;
[INFO] [stdout] 20 | |
[INFO] [stdout] ...  |
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 48 | 
[INFO] [stdout] 49 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 | ...                   tftp.handle_read_request(src.to_owned(), rrq);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   tftp.handle_write_request(src.to_owned(), wrq);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |                         tftp_rs::send_error(src, "Don't wanna parse");
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                 tftp_rs::send_error(src, "Invalid Initial Request");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 | ...                   tftp.handle_read_request(src.to_owned(), rrq);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   tftp.handle_write_request(src.to_owned(), wrq);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |                         tftp_rs::send_error(src, "Don't wanna parse");
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                 tftp_rs::send_error(src, "Invalid Initial Request");
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "7f629bef6202ba8a67389d6aae6fec5ff81dd67102fb661bec8cce908092003f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f629bef6202ba8a67389d6aae6fec5ff81dd67102fb661bec8cce908092003f", kill_on_drop: false }`
[INFO] [stdout] 7f629bef6202ba8a67389d6aae6fec5ff81dd67102fb661bec8cce908092003f