[INFO] cloning repository https://github.com/Anecoz/falafel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Anecoz/falafel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 856b17895f5e44ab7fa35bc4bf6229e9c000adc7
[INFO] testing Anecoz/falafel against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnecoz%2Ffalafel" "/workspace/builds/worker-73/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-73/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anecoz/falafel on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Anecoz/falafel
[INFO] finished tweaking git repo https://github.com/Anecoz/falafel
[INFO] tweaked toml for git repo https://github.com/Anecoz/falafel written to /workspace/builds/worker-73/source/Cargo.toml
[INFO] crate git repo https://github.com/Anecoz/falafel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98fe00d09b2994f284483ece9dc3d0b720dcbc8d488c820cc8666bde0bf8fc90
[INFO] running `Command { std: "docker" "start" "-a" "98fe00d09b2994f284483ece9dc3d0b720dcbc8d488c820cc8666bde0bf8fc90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98fe00d09b2994f284483ece9dc3d0b720dcbc8d488c820cc8666bde0bf8fc90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98fe00d09b2994f284483ece9dc3d0b720dcbc8d488c820cc8666bde0bf8fc90", kill_on_drop: false }`
[INFO] [stdout] 98fe00d09b2994f284483ece9dc3d0b720dcbc8d488c820cc8666bde0bf8fc90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61a97833ff24bf6cfb36aee1fb856bac5b695c5c0852e5b0f4cda3aa64fdff4d
[INFO] running `Command { std: "docker" "start" "-a" "61a97833ff24bf6cfb36aee1fb856bac5b695c5c0852e5b0f4cda3aa64fdff4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling falafel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `serialize`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |   pub fn serialize(packet: PacketType) -> Vec<u8> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/server.rs:65:26
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => panic!(error),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => panic!("{}", error),
[INFO] [stdout]    |                          +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => std::panic::panic_any(error),
[INFO] [stdout]    |                   ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]  --> src/common.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   pub const HEADER_SIZE: u32 = 2; // 1 byte for type, 1 byte for size of packet
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `PacketHeader`
[INFO] [stdout]  --> src/common.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub struct PacketHeader {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize_header`
[INFO] [stdout]   --> src/common.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn deserialize_header(header_bytes: Vec<u8>) -> PacketHeader {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize`
[INFO] [stdout]   --> src/common.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |   pub fn deserialize(header: PacketHeader, content_bytes: Vec<u8>) -> PacketType {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     std::io::stdout().flush();
[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/client.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     writer.write(&serialized[..]);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "61a97833ff24bf6cfb36aee1fb856bac5b695c5c0852e5b0f4cda3aa64fdff4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61a97833ff24bf6cfb36aee1fb856bac5b695c5c0852e5b0f4cda3aa64fdff4d", kill_on_drop: false }`
[INFO] [stdout] 61a97833ff24bf6cfb36aee1fb856bac5b695c5c0852e5b0f4cda3aa64fdff4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 524313a96dc7905a1f7b0d068cf12fec2dc4ad94033dd0a042eab6cd3df9ba58
[INFO] running `Command { std: "docker" "start" "-a" "524313a96dc7905a1f7b0d068cf12fec2dc4ad94033dd0a042eab6cd3df9ba58", kill_on_drop: false }`
[INFO] [stderr]    Compiling falafel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]  --> src/common.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   pub const HEADER_SIZE: u32 = 2; // 1 byte for type, 1 byte for size of packet
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serialize`
[INFO] [stdout]   --> src/common.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |   pub fn serialize(packet: PacketType) -> Vec<u8> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `PacketHeader`
[INFO] [stdout]  --> src/common.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |   pub struct PacketHeader {
[INFO] [stdout]   |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize_header`
[INFO] [stdout]   --> src/common.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn deserialize_header(header_bytes: Vec<u8>) -> PacketHeader {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `deserialize`
[INFO] [stdout]   --> src/common.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |   pub fn deserialize(header: PacketHeader, content_bytes: Vec<u8>) -> PacketType {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/client.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     std::io::stdout().flush();
[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/client.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     writer.write(&serialized[..]);
[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: panic message is not a string literal
[INFO] [stdout]   --> src/server.rs:65:26
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => panic!(error),
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => panic!("{}", error),
[INFO] [stdout]    |                          +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 65 |     Err(error) => std::panic::panic_any(error),
[INFO] [stdout]    |                   ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.74s
[INFO] [stderr]   Executable unittests src/client.rs (/opt/rustwide/target/debug/deps/client-0223209f3a029020)
[INFO] [stderr]   Executable unittests src/server.rs (/opt/rustwide/target/debug/deps/server-e0ad0501598113db)
[INFO] running `Command { std: "docker" "inspect" "524313a96dc7905a1f7b0d068cf12fec2dc4ad94033dd0a042eab6cd3df9ba58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "524313a96dc7905a1f7b0d068cf12fec2dc4ad94033dd0a042eab6cd3df9ba58", kill_on_drop: false }`
[INFO] [stdout] 524313a96dc7905a1f7b0d068cf12fec2dc4ad94033dd0a042eab6cd3df9ba58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fa4fda7fc8880fd215e0a9c84a2c7c548044c4c132bba9dc5fdf6a14feef9ede
[INFO] running `Command { std: "docker" "start" "-a" "fa4fda7fc8880fd215e0a9c84a2c7c548044c4c132bba9dc5fdf6a14feef9ede", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: function is never used: `serialize`
[INFO] [stderr]   --> src/common.rs:14:10
[INFO] [stderr]    |
[INFO] [stderr] 14 |   pub fn serialize(packet: PacketType) -> Vec<u8> {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/server.rs:65:26
[INFO] [stderr]    |
[INFO] [stderr] 65 |     Err(error) => panic!(error),
[INFO] [stderr]    |                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 65 |     Err(error) => panic!("{}", error),
[INFO] [stderr]    |                          +++++
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]    |
[INFO] [stderr] 65 |     Err(error) => std::panic::panic_any(error),
[INFO] [stderr]    |                   ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stderr] 
[INFO] [stderr] warning: `falafel` (bin "server" test) generated 2 warnings
[INFO] [stderr] warning: constant is never used: `HEADER_SIZE`
[INFO] [stderr]  --> src/common.rs:2:3
[INFO] [stderr]   |
[INFO] [stderr] 2 |   pub const HEADER_SIZE: u32 = 2; // 1 byte for type, 1 byte for size of packet
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `PacketHeader`
[INFO] [stderr]  --> src/common.rs:9:14
[INFO] [stderr]   |
[INFO] [stderr] 9 |   pub struct PacketHeader {
[INFO] [stderr]   |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] running 0 tests
[INFO] [stderr] warning: function is never used: `deserialize_header`
[INFO] [stdout] 
[INFO] [stderr]   --> src/common.rs:33:10
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 33 |   pub fn deserialize_header(header_bytes: Vec<u8>) -> PacketHeader {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `deserialize`
[INFO] [stderr]   --> src/common.rs:40:10
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn deserialize(header: PacketHeader, content_bytes: Vec<u8>) -> PacketType {
[INFO] [stderr]    |          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/client.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     std::io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/client.rs:40:5
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 40 |     writer.write(&serialized[..]);
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] warning: `falafel` (bin "client" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.69s
[INFO] [stderr]      Running unittests src/client.rs (/opt/rustwide/target/debug/deps/client-0223209f3a029020)
[INFO] [stderr]      Running unittests src/server.rs (/opt/rustwide/target/debug/deps/server-e0ad0501598113db)
[INFO] running `Command { std: "docker" "inspect" "fa4fda7fc8880fd215e0a9c84a2c7c548044c4c132bba9dc5fdf6a14feef9ede", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa4fda7fc8880fd215e0a9c84a2c7c548044c4c132bba9dc5fdf6a14feef9ede", kill_on_drop: false }`
[INFO] [stdout] fa4fda7fc8880fd215e0a9c84a2c7c548044c4c132bba9dc5fdf6a14feef9ede