[INFO] cloning repository https://github.com/fstepien/rust-http-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fstepien/rust-http-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstepien%2Frust-http-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstepien%2Frust-http-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e04807e2bc751ce95902a15b4b3e023824497551
[INFO] checking fstepien/rust-http-server against try#987a165cfab916796a8315782b83ac460a651ce2 for pr-145262
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffstepien%2Frust-http-server" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fstepien/rust-http-server
[INFO] finished tweaking git repo https://github.com/fstepien/rust-http-server
[INFO] tweaked toml for git repo https://github.com/fstepien/rust-http-server written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fstepien/rust-http-server on toolchain 987a165cfab916796a8315782b83ac460a651ce2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fstepien/rust-http-server 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" "+987a165cfab916796a8315782b83ac460a651ce2" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad532e9563f9572acf498bf1f3516fb3454801cf76ecc9e0e64611c281ebb202
[INFO] running `Command { std: "docker" "start" "-a" "ad532e9563f9572acf498bf1f3516fb3454801cf76ecc9e0e64611c281ebb202", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad532e9563f9572acf498bf1f3516fb3454801cf76ecc9e0e64611c281ebb202", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad532e9563f9572acf498bf1f3516fb3454801cf76ecc9e0e64611c281ebb202", kill_on_drop: false }`
[INFO] [stdout] ad532e9563f9572acf498bf1f3516fb3454801cf76ecc9e0e64611c281ebb202
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4938f7f1c917ab41d11368f9028f697ddfce5d4aa69248ac55443f97e1c45ed
[INFO] running `Command { std: "docker" "start" "-a" "c4938f7f1c917ab41d11368f9028f697ddfce5d4aa69248ac55443f97e1c45ed", kill_on_drop: false }`
[INFO] [stderr]     Checking http-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `http::Method`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use http::Method;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `http::Request`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use http::Request;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `request::ParseError`
[INFO] [stdout]  --> src/http/mod.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use request::ParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/http/request.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> src/server.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `http::Method`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use http::Method;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `http::Request`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use http::Request;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `request::ParseError`
[INFO] [stdout]  --> src/http/mod.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use request::ParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/http/request.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]  --> src/server.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::net::{TcpListener, TcpStream};
[INFO] [stdout]   |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:28:42
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let request = str::from_utf8(buf)?;
[INFO] [stdout]    |                       -------------------^ the trait `From<Utf8Error>` is not implemented for `String`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this can't be annotated with `?` because it has type `Result<_, Utf8Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:35:89
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let (method, request) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                        ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                        |
[INFO] [stdout]    |                                                        this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:36:87
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let (path, request) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                      ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                      |
[INFO] [stdout]    |                                                      this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:37:85
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (protocol, _) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                    ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                    |
[INFO] [stdout]    |                                                    this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:28:42
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let request = str::from_utf8(buf)?;
[INFO] [stdout]    |                       -------------------^ the trait `From<Utf8Error>` is not implemented for `String`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this can't be annotated with `?` because it has type `Result<_, Utf8Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:35:89
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let (method, request) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                        ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                        |
[INFO] [stdout]    |                                                        this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:36:87
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let (path, request) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                      ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                      |
[INFO] [stdout]    |                                                      this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:37:85
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let (protocol, _) = get_next_word(request).ok_or(ParseError::InvalidRequest)?;
[INFO] [stdout]    |                                                    ---------------------------------^ the trait `From<ParseError>` is not implemented for `String`
[INFO] [stdout]    |                                                    |
[INFO] [stdout]    |                                                    this can't be annotated with `?` because it has type `Result<_, ParseError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `ParseError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/request.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum ParseError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/http/request.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol);
[INFO] [stdout]    |                    --- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `String`, found `ParseError`
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    arguments to this enum variant are incorrect
[INFO] [stdout]    |
[INFO] [stdout] help: the type constructed contains `ParseError` due to the type of the argument passed
[INFO] [stdout]   --> src/http/request.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol);
[INFO] [stdout]    |                    ^^^^---------------------------^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this argument influences the type of `Err`
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]   --> /rustc/987a165cfab916796a8315782b83ac460a651ce2/library/core/src/result.rs:558:5
[INFO] [stdout] help: try using a conversion method
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol.to_string());
[INFO] [stdout]    |                                                   ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:43:44
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let method: Method = method.parse()?;
[INFO] [stdout]    |                                     -------^ the trait `From<MethodError>` is not implemented for `String`
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     this can't be annotated with `?` because it has type `Result<_, MethodError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `MethodError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/method.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct MethodError;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/http/request.rs:40:24
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol);
[INFO] [stdout]    |                    --- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `String`, found `ParseError`
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    arguments to this enum variant are incorrect
[INFO] [stdout]    |
[INFO] [stdout] help: the type constructed contains `ParseError` due to the type of the argument passed
[INFO] [stdout]   --> src/http/request.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol);
[INFO] [stdout]    |                    ^^^^---------------------------^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this argument influences the type of `Err`
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]   --> /rustc/987a165cfab916796a8315782b83ac460a651ce2/library/core/src/result.rs:558:5
[INFO] [stdout] help: try using a conversion method
[INFO] [stdout]    |
[INFO] [stdout] 40 |             return Err(ParseError::InvalidProtocol.to_string());
[INFO] [stdout]    |                                                   ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `String`
[INFO] [stdout]   --> src/http/request.rs:43:44
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let method: Method = method.parse()?;
[INFO] [stdout]    |                                     -------^ the trait `From<MethodError>` is not implemented for `String`
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     this can't be annotated with `?` because it has type `Result<_, MethodError>`
[INFO] [stdout]    |
[INFO] [stdout] note: `MethodError` needs to implement `Into<String>`
[INFO] [stdout]   --> src/http/method.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct MethodError;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `String` implements `From<&String>`
[INFO] [stdout]              `String` implements `From<&mut str>`
[INFO] [stdout]              `String` implements `From<&str>`
[INFO] [stdout]              `String` implements `From<Box<str>>`
[INFO] [stdout]              `String` implements `From<Cow<'_, str>>`
[INFO] [stdout]              `String` implements `From<char>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request`
[INFO] [stdout]   --> src/server.rs:27:36
[INFO] [stdout]    |
[INFO] [stdout] 27 | ...                   Ok(request) => {}
[INFO] [stdout]    |                          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `request`
[INFO] [stdout]   --> src/server.rs:27:36
[INFO] [stdout]    |
[INFO] [stdout] 27 | ...                   Ok(request) => {}
[INFO] [stdout]    |                          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_request`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `http-server` (bin "http-server" test) due to 6 previous errors; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `http-server` (bin "http-server") due to 6 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c4938f7f1c917ab41d11368f9028f697ddfce5d4aa69248ac55443f97e1c45ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4938f7f1c917ab41d11368f9028f697ddfce5d4aa69248ac55443f97e1c45ed", kill_on_drop: false }`
[INFO] [stdout] c4938f7f1c917ab41d11368f9028f697ddfce5d4aa69248ac55443f97e1c45ed
