[INFO] cloning repository https://github.com/telegicloetrocongelateur/rfb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/telegicloetrocongelateur/rfb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftelegicloetrocongelateur%2Frfb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftelegicloetrocongelateur%2Frfb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dee328732c88dfc530b1265a4e8cc3932a07aee2
[INFO] checking telegicloetrocongelateur/rfb against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftelegicloetrocongelateur%2Frfb" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/telegicloetrocongelateur/rfb on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/telegicloetrocongelateur/rfb
[INFO] finished tweaking git repo https://github.com/telegicloetrocongelateur/rfb
[INFO] tweaked toml for git repo https://github.com/telegicloetrocongelateur/rfb written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/telegicloetrocongelateur/rfb 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustix v0.36.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f42a28f6bbace9b98c01149c9067960d4b999a744bd4c0fe4784808cbe08ba0
[INFO] running `Command { std: "docker" "start" "-a" "0f42a28f6bbace9b98c01149c9067960d4b999a744bd4c0fe4784808cbe08ba0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f42a28f6bbace9b98c01149c9067960d4b999a744bd4c0fe4784808cbe08ba0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f42a28f6bbace9b98c01149c9067960d4b999a744bd4c0fe4784808cbe08ba0", kill_on_drop: false }`
[INFO] [stdout] 0f42a28f6bbace9b98c01149c9067960d4b999a744bd4c0fe4784808cbe08ba0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f6e0210570a70b2dbaefebc52b20d674c51e66fad0f2d57c4a8b4b37d47cff8
[INFO] running `Command { std: "docker" "start" "-a" "7f6e0210570a70b2dbaefebc52b20d674c51e66fad0f2d57c4a8b4b37d47cff8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking rfb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/io.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/messages/pixel_format.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/framebuffer_update.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::io::{BigEndian, DecodeFrom, EncodeTo};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/set_encodings.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::io::{BigEndian, Decode, DecodeFrom, Encode, EncodeTo, Length};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> src/client.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 let reason = String::decode_from(&mut reader)?;
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/error.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn from(value: TryFromIntError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple ranges are one apart
[INFO] [stdout]   --> src/messages/security.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             3..15 | 128 | 130..134 | 192 => RealVnc,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this range doesn't match `15_u8` because `..` is an exclusive range
[INFO] [stdout]    |             help: use an inclusive range instead: `3_u8..=15_u8`
[INFO] [stdout] 36 |             16 => Tight,
[INFO] [stdout]    |             -- this could appear to continue range `3_u8..15_u8`, but `15_u8` isn't matched by either of them
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_contiguous_range_endpoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pixel_format` and `version` are never read
[INFO] [stdout]   --> src/client.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 13 |     pixel_format: PixelFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     version: Version,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Endian` is never used
[INFO] [stdout]    --> src/io.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 | trait Endian {}
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.3
[INFO] [stderr]     Checking is-terminal v0.4.5
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/io.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/messages/pixel_format.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/framebuffer_update.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::io::{BigEndian, DecodeFrom, EncodeTo};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/set_encodings.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::io::{BigEndian, Decode, DecodeFrom, Encode, EncodeTo, Length};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]  --> src/server.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |         io::{BufRead, BufReader, BufWriter, Write},
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Encode`
[INFO] [stdout]  --> src/server.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |         io::{DecodeFrom, Encode, EncodeTo},
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/server.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |             std::thread::sleep_ms(1);
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/server.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         panic!("BONOJOIUJOPIUOPIHJIOUHOIUH");
[INFO] [stdout]    |         ------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 71 |
[INFO] [stdout] 72 |         Ok(())
[INFO] [stdout]    |         ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> src/client.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 let reason = String::decode_from(&mut reader)?;
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/error.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn from(value: TryFromIntError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple ranges are one apart
[INFO] [stdout]   --> src/messages/security.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             3..15 | 128 | 130..134 | 192 => RealVnc,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this range doesn't match `15_u8` because `..` is an exclusive range
[INFO] [stdout]    |             help: use an inclusive range instead: `3_u8..=15_u8`
[INFO] [stdout] 36 |             16 => Tight,
[INFO] [stdout]    |             -- this could appear to continue range `3_u8..15_u8`, but `15_u8` isn't matched by either of them
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_contiguous_range_endpoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/server.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let (stream, addr) = TcpListener::bind("0.0.0.0:5900")?.accept()?;
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pixel_format` and `version` are never read
[INFO] [stdout]   --> src/client.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 13 |     pixel_format: PixelFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     version: Version,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Endian` is never used
[INFO] [stdout]    --> src/io.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 | trait Endian {}
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         writer.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let _ = writer.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         writer.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = writer.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `Command { std: "docker" "inspect" "7f6e0210570a70b2dbaefebc52b20d674c51e66fad0f2d57c4a8b4b37d47cff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f6e0210570a70b2dbaefebc52b20d674c51e66fad0f2d57c4a8b4b37d47cff8", kill_on_drop: false }`
[INFO] [stdout] 7f6e0210570a70b2dbaefebc52b20d674c51e66fad0f2d57c4a8b4b37d47cff8
[INFO] checking telegicloetrocongelateur/rfb against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftelegicloetrocongelateur%2Frfb" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/telegicloetrocongelateur/rfb on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/telegicloetrocongelateur/rfb
[INFO] finished tweaking git repo https://github.com/telegicloetrocongelateur/rfb
[INFO] tweaked toml for git repo https://github.com/telegicloetrocongelateur/rfb written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/telegicloetrocongelateur/rfb 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32ee01dbaed5e2b31373d1174323787902b6333fb8455936552608f4a8400103
[INFO] running `Command { std: "docker" "start" "-a" "32ee01dbaed5e2b31373d1174323787902b6333fb8455936552608f4a8400103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32ee01dbaed5e2b31373d1174323787902b6333fb8455936552608f4a8400103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32ee01dbaed5e2b31373d1174323787902b6333fb8455936552608f4a8400103", kill_on_drop: false }`
[INFO] [stdout] 32ee01dbaed5e2b31373d1174323787902b6333fb8455936552608f4a8400103
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35058af4c98957cdf6fdb82f53e6159121617b01c9f91f95ea71d9cc138b37b1
[INFO] running `Command { std: "docker" "start" "-a" "35058af4c98957cdf6fdb82f53e6159121617b01c9f91f95ea71d9cc138b37b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking rfb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/io.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/messages/pixel_format.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/framebuffer_update.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::io::{BigEndian, DecodeFrom, EncodeTo};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/set_encodings.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::io::{BigEndian, Decode, DecodeFrom, Encode, EncodeTo, Length};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> src/client.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 let reason = String::decode_from(&mut reader)?;
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/error.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn from(value: TryFromIntError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple ranges are one apart
[INFO] [stdout]   --> src/messages/security.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             3..15 | 128 | 130..134 | 192 => RealVnc,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this range doesn't match `15_u8` because `..` is an exclusive range
[INFO] [stdout]    |             help: use an inclusive range instead: `3_u8..=15_u8`
[INFO] [stdout] 36 |             16 => Tight,
[INFO] [stdout]    |             -- this could appear to continue range `3_u8..15_u8`, but `15_u8` isn't matched by either of them
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_contiguous_range_endpoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pixel_format` and `version` are never read
[INFO] [stdout]   --> src/client.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 13 |     pixel_format: PixelFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     version: Version,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Endian` is never used
[INFO] [stdout]    --> src/io.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 | trait Endian {}
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.3
[INFO] [stderr]     Checking is-terminal v0.4.5
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufRead`
[INFO] [stdout]  --> src/client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::BufRead;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/io.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Infallible`
[INFO] [stdout]  --> src/messages/pixel_format.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::Infallible;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/framebuffer_update.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::io::{BigEndian, DecodeFrom, EncodeTo};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BigEndian`
[INFO] [stdout]  --> src/messages/set_encodings.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::io::{BigEndian, Decode, DecodeFrom, Encode, EncodeTo, Length};
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]  --> src/server.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |         io::{BufRead, BufReader, BufWriter, Write},
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Encode`
[INFO] [stdout]  --> src/server.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |         io::{DecodeFrom, Encode, EncodeTo},
[INFO] [stdout]   |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/server.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |             std::thread::sleep_ms(1);
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/server.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         panic!("BONOJOIUJOPIUOPIHJIOUHOIUH");
[INFO] [stdout]    |         ------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 71 |
[INFO] [stdout] 72 |         Ok(())
[INFO] [stdout]    |         ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> src/client.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 let reason = String::decode_from(&mut reader)?;
[INFO] [stdout]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `framebuffer`
[INFO] [stdout]   --> src/client.rs:86:13
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/error.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn from(value: TryFromIntError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple ranges are one apart
[INFO] [stdout]   --> src/messages/security.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             3..15 | 128 | 130..134 | 192 => RealVnc,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this range doesn't match `15_u8` because `..` is an exclusive range
[INFO] [stdout]    |             help: use an inclusive range instead: `3_u8..=15_u8`
[INFO] [stdout] 36 |             16 => Tight,
[INFO] [stdout]    |             -- this could appear to continue range `3_u8..15_u8`, but `15_u8` isn't matched by either of them
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_contiguous_range_endpoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `addr`
[INFO] [stdout]   --> src/server.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let (stream, addr) = TcpListener::bind("0.0.0.0:5900")?.accept()?;
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pixel_format` and `version` are never read
[INFO] [stdout]   --> src/client.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 13 |     pixel_format: PixelFormat,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     version: Version,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Endian` is never used
[INFO] [stdout]    --> src/io.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 | trait Endian {}
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         writer.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let _ = writer.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         writer.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = writer.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.27s
[INFO] running `Command { std: "docker" "inspect" "35058af4c98957cdf6fdb82f53e6159121617b01c9f91f95ea71d9cc138b37b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35058af4c98957cdf6fdb82f53e6159121617b01c9f91f95ea71d9cc138b37b1", kill_on_drop: false }`
[INFO] [stdout] 35058af4c98957cdf6fdb82f53e6159121617b01c9f91f95ea71d9cc138b37b1