[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] testing telegicloetrocongelateur/rfb against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftelegicloetrocongelateur%2Frfb" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[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-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/telegicloetrocongelateur/rfb on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a84c3dcf46ad3898e7b4ed2cad3cea29342e2ccbc2da2ce55bd6b8d16e6a554a
[INFO] running `Command { std: "docker" "start" "-a" "a84c3dcf46ad3898e7b4ed2cad3cea29342e2ccbc2da2ce55bd6b8d16e6a554a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a84c3dcf46ad3898e7b4ed2cad3cea29342e2ccbc2da2ce55bd6b8d16e6a554a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a84c3dcf46ad3898e7b4ed2cad3cea29342e2ccbc2da2ce55bd6b8d16e6a554a", kill_on_drop: false }`
[INFO] [stdout] a84c3dcf46ad3898e7b4ed2cad3cea29342e2ccbc2da2ce55bd6b8d16e6a554a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 045dfc1cdebd2fb694e98f0c48a0a79376357b9b584c7122c6896412f32c3732
[INFO] running `Command { std: "docker" "start" "-a" "045dfc1cdebd2fb694e98f0c48a0a79376357b9b584c7122c6896412f32c3732", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: the feature `exclusive_range_pattern` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` 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: 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "045dfc1cdebd2fb694e98f0c48a0a79376357b9b584c7122c6896412f32c3732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "045dfc1cdebd2fb694e98f0c48a0a79376357b9b584c7122c6896412f32c3732", kill_on_drop: false }`
[INFO] [stdout] 045dfc1cdebd2fb694e98f0c48a0a79376357b9b584c7122c6896412f32c3732
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83e868cb740b198248dbf50cfb5ebd2daf3fe69549130a141b06291601ac45c3
[INFO] running `Command { std: "docker" "start" "-a" "83e868cb740b198248dbf50cfb5ebd2daf3fe69549130a141b06291601ac45c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]    Compiling linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling termcolor v1.2.0
[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: the feature `exclusive_range_pattern` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` 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: 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] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling regex v1.7.3
[INFO] [stderr]    Compiling is-terminal v0.4.5
[INFO] [stderr]    Compiling env_logger v0.10.0
[INFO] [stderr]    Compiling 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 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: the feature `exclusive_range_pattern` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 42.62s
[INFO] running `Command { std: "docker" "inspect" "83e868cb740b198248dbf50cfb5ebd2daf3fe69549130a141b06291601ac45c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83e868cb740b198248dbf50cfb5ebd2daf3fe69549130a141b06291601ac45c3", kill_on_drop: false }`
[INFO] [stdout] 83e868cb740b198248dbf50cfb5ebd2daf3fe69549130a141b06291601ac45c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9926a7ee17d9f8b21d1d96dc38a645cba60a6227dc2b0074bd62f37192768ef6
[INFO] running `Command { std: "docker" "start" "-a" "9926a7ee17d9f8b21d1d96dc38a645cba60a6227dc2b0074bd62f37192768ef6", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(generic_const_exprs)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stderr]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufRead`
[INFO] [stderr]  --> src/client.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::BufRead;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/client.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::array`
[INFO] [stderr]  --> src/io.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::array;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::Infallible`
[INFO] [stderr]  --> src/io.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::convert::Infallible;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::Infallible`
[INFO] [stderr]  --> src/messages/pixel_format.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::convert::Infallible;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BigEndian`
[INFO] [stderr]  --> src/messages/framebuffer_update.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::io::{BigEndian, DecodeFrom, EncodeTo};
[INFO] [stderr]   |                 ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BigEndian`
[INFO] [stderr]  --> src/messages/set_encodings.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::io::{BigEndian, Decode, DecodeFrom, Encode, EncodeTo, Length};
[INFO] [stderr]   |                 ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `exclusive_range_pattern` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(exclusive_range_pattern)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reason`
[INFO] [stderr]   --> src/client.rs:47:21
[INFO] [stderr]    |
[INFO] [stderr] 47 |                 let reason = String::decode_from(&mut reader)?;
[INFO] [stderr]    |                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `framebuffer`
[INFO] [stderr]   --> src/client.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `framebuffer`
[INFO] [stderr]   --> src/client.rs:86:13
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let framebuffer = FramebufferUpdate::decode_from(&mut reader)?;
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_framebuffer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/error.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn from(value: TryFromIntError) -> Self {
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: multiple ranges are one apart
[INFO] [stderr]   --> src/messages/security.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             3..15 | 128 | 130..134 | 192 => RealVnc,
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             this range doesn't match `15_u8` because `..` is an exclusive range
[INFO] [stderr]    |             help: use an inclusive range instead: `3_u8..=15_u8`
[INFO] [stderr] 36 |             16 => Tight,
[INFO] [stderr]    |             -- this could appear to continue range `3_u8..15_u8`, but `15_u8` isn't matched by either of them
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_contiguous_range_endpoints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `pixel_format` and `version` are never read
[INFO] [stderr]   --> src/client.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub struct Client {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] 13 |     pixel_format: PixelFormat,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 14 |     version: Version,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Endian` is never used
[INFO] [stderr]    --> src/io.rs:119:7
[INFO] [stderr]     |
[INFO] [stderr] 119 | trait Endian {}
[INFO] [stderr]     |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rfb` (lib) generated 16 warnings (run `cargo fix --lib -p rfb` to apply 7 suggestions)
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]  --> src/server.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 |         io::{BufRead, BufReader, BufWriter, Write},
[INFO] [stderr]   |              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Encode`
[INFO] [stderr]  --> src/server.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 |         io::{DecodeFrom, Encode, EncodeTo},
[INFO] [stderr]   |                          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stderr]   --> src/server.rs:56:26
[INFO] [stderr]    |
[INFO] [stderr] 56 |             std::thread::sleep_ms(1);
[INFO] [stderr]    |                          ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/server.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         panic!("BONOJOIUJOPIUOPIHJIOUHOIUH");
[INFO] [stderr]    |         ------------------------------------ any code following this expression is unreachable
[INFO] [stderr] 71 |
[INFO] [stderr] 72 |         Ok(())
[INFO] [stderr]    |         ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]   --> src/server.rs:18:22
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let (stream, addr) = TcpListener::bind("0.0.0.0:5900")?.accept()?;
[INFO] [stderr]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/server.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |         writer.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 30 |         let _ = writer.flush();
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/server.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         writer.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let _ = writer.flush();
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rfb` (lib test) generated 23 warnings (16 duplicates) (run `cargo fix --lib -p rfb --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rfb-94d532cc054ee2f4)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test client::tests::client ... FAILED
[INFO] [stdout] test server::tests::server has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "9926a7ee17d9f8b21d1d96dc38a645cba60a6227dc2b0074bd62f37192768ef6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9926a7ee17d9f8b21d1d96dc38a645cba60a6227dc2b0074bd62f37192768ef6", kill_on_drop: false }`
[INFO] [stdout] 9926a7ee17d9f8b21d1d96dc38a645cba60a6227dc2b0074bd62f37192768ef6
