Fix more small things

core/lib/src/data/data.rs

@@ -114,7 +114,7 @@ impl<'r> Data<'r> {
     /// use rocket::data::{Data, FromData, Outcome};
     /// use rocket::http::Status;
     /// # struct MyType;
-    /// # #[derive(rocket::TypedError)]
+    /// # #[derive(rocket::TypedError, Debug)]
     /// # struct MyError;
     ///
     /// #[rocket::async_trait]

core/lib/src/data/from_data.rs

@@ -1,3 +1,5 @@
+use std::fmt;
+
 use crate::catcher::TypedError;
 use crate::http::RawStr;
 use crate::request::{Request, local_cache};
@@ -182,7 +184,7 @@ pub type Outcome<'r, T, E = <T as FromData<'r>>::Error>
 /// use rocket::request::Request;
 /// use rocket::data::{self, Data, FromData};
 /// # struct MyType;
-/// # #[derive(rocket::TypedError)]
+/// # #[derive(rocket::TypedError, Debug)]
 /// # struct MyError;
 ///
 /// #[rocket::async_trait]
@@ -312,7 +314,7 @@ pub type Outcome<'r, T, E = <T as FromData<'r>>::Error>
 #[crate::async_trait]
 pub trait FromData<'r>: Sized {
     /// The associated error to be returned when the guard fails.
-    type Error: TypedError<'r> + 'r;
+    type Error: TypedError<'r> + fmt::Debug + 'r;
 
     /// Asynchronously validates, parses, and converts an instance of `Self`
     /// from the incoming request body data.

core/lib/src/request/from_param.rs

@@ -160,7 +160,7 @@ use crate::http::{uri::{Segments, error::PathError, fmt::Path}, Status};
 /// use rocket::TypedError;
 /// # #[allow(dead_code)]
 /// # struct MyParam<'r> { key: &'r str, value: usize }
-/// #[derive(TypedError)]
+/// #[derive(TypedError, Debug)]
 /// struct MyParamError<'a>(&'a str);
 ///
 /// impl<'r> FromParam<'r> for MyParam<'r> {
@@ -192,7 +192,7 @@ use crate::http::{uri::{Segments, error::PathError, fmt::Path}, Status};
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::request::FromParam;
 /// # use rocket::TypedError;
-/// # #[derive(TypedError)]
+/// # #[derive(TypedError, Debug)]
 /// # struct MyParamError<'a>(&'a str);
 /// # #[allow(dead_code)]
 /// # struct MyParam<'r> { key: &'r str, value: usize }
@@ -215,7 +215,7 @@ use crate::http::{uri::{Segments, error::PathError, fmt::Path}, Status};
 /// ```
 pub trait FromParam<'a>: Sized {
     /// The associated error to be returned if parsing/validation fails.
-    type Error: TypedError<'a>;
+    type Error: TypedError<'a> + fmt::Debug + 'a;
 
     /// Parses and validates an instance of `Self` from a path parameter string
     /// or returns an `Error` if parsing or validation fails.
@@ -397,7 +397,7 @@ impl<'a, T: FromParam<'a>> FromParam<'a> for Option<T> {
 /// the `Utf8Error`.
 pub trait FromSegments<'r>: Sized {
     /// The associated error to be returned when parsing fails.
-    type Error: TypedError<'r>;
+    type Error: TypedError<'r> + fmt::Debug + 'r;
 
     /// Parses an instance of `Self` from many dynamic path parameter strings or
     /// returns an `Error` if one cannot be parsed.

core/lib/src/request/from_request.rs

@@ -1,4 +1,5 @@
 use std::convert::Infallible;
+use std::fmt;
 use std::net::{IpAddr, SocketAddr};
 
 use crate::catcher::TypedError;
@@ -36,7 +37,7 @@ pub type Outcome<S, E> = outcome::Outcome<S, E, E>;
 /// use rocket::request::{self, Request, FromRequest};
 /// # struct MyType;
 /// # use rocket::TypedError;
-/// # #[derive(TypedError)]
+/// # #[derive(TypedError, Debug)]
 /// # struct MyError;
 ///
 /// #[rocket::async_trait]
@@ -408,7 +409,7 @@ pub type Outcome<S, E> = outcome::Outcome<S, E, E>;
 #[crate::async_trait]
 pub trait FromRequest<'r>: Sized {
     /// The associated error to be returned if derivation fails.
-    type Error: TypedError<'r> + 'r;
+    type Error: TypedError<'r> + fmt::Debug + 'r;
 
     /// Derives an instance of `Self` from the incoming request metadata.
     ///

docs/guide/12-pastebin.md

@@ -367,7 +367,7 @@ use rocket::tokio::fs::File;
 #     pub fn new(size: usize) -> PasteId<'static> { todo!() }
 #     pub fn file_path(&self) -> PathBuf { todo!() }
 # }
-# #[derive(rocket::TypedError)]
+# #[derive(Debug, rocket::TypedError)]
 # pub struct InvalidPasteId;
 # impl<'a> FromParam<'a> for PasteId<'a> {
 #     type Error = InvalidPasteId;
@@ -446,7 +446,7 @@ pub struct PasteId<'a>(Cow<'a, str>);
 #     pub fn file_path(&self) -> PathBuf { todo!() }
 # }
 #
-# #[derive(rocket::TypedError)]
+# #[derive(Debug, rocket::TypedError)]
 # pub struct InvalidPasteId;
 # impl<'a> FromParam<'a> for PasteId<'a> {
 #     type Error = InvalidPasteId;