Trait StdError

pub(crate) trait StdError: Debug + Display {
    // Provided methods
    fn source(&self) -> Option<&(dyn Error + 'static)> { ... }
    fn description(&self) -> &str { ... }
    fn cause(&self) -> Option<&dyn Error> { ... }
    fn provide<'a>(&'a self, request: &mut Request<'a>) { ... }
}

Error is a trait representing the basic expectations for error values, i.e., values of type E in Result<T, E>.

Errors must describe themselves through the Display and Debug traits. Error messages are typically concise lowercase sentences without trailing punctuation:

let err = "NaN".parse::<u32>().unwrap_err();
assert_eq!(err.to_string(), "invalid digit found in string");

Errors may provide cause information. Error::source() is generally used when errors cross “abstraction boundaries”. If one module must report an error that is caused by an error from a lower-level module, it can allow accessing that error via Error::source(). This makes it possible for the high-level module to provide its own errors while also revealing some of the implementation for debugging.

Example

Implementing the Error trait only requires that Debug and Display are implemented too.

use std::error::Error;
use std::fmt;
use std::path::PathBuf;

#[derive(Debug)]
struct ReadConfigError {
    path: PathBuf
}

impl fmt::Display for ReadConfigError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let path = self.path.display();
        write!(f, "unable to read configuration at {path}")
    }
}

impl Error for ReadConfigError {}

Provided Methods

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

Examples

use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct SuperError {
    source: SuperErrorSideKick,
}

impl fmt::Display for SuperError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "SuperError is here!")
    }
}

impl Error for SuperError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        Some(&self.source)
    }
}

#[derive(Debug)]
struct SuperErrorSideKick;

impl fmt::Display for SuperErrorSideKick {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "SuperErrorSideKick is here!")
    }
}

impl Error for SuperErrorSideKick {}

fn get_super_error() -> Result<(), SuperError> {
    Err(SuperError { source: SuperErrorSideKick })
}

fn main() {
    match get_super_error() {
        Err(e) => {
            println!("Error: {e}");
            println!("Caused by: {}", e.source().unwrap());
        }
        _ => println!("No error"),
    }
}

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() {
    // Print `e` itself, no need for description().
    eprintln!("Error: {e}");
}

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

Used in conjunction with Request::provide_value and Request::provide_ref to extract references to member variables from dyn Error trait objects.

Example

#![feature(error_generic_member_access)]
use core::fmt;
use core::error::{request_ref, Request};

#[derive(Debug)]
enum MyLittleTeaPot {
    Empty,
}

#[derive(Debug)]
struct MyBacktrace {
    // ...
}

impl MyBacktrace {
    fn new() -> MyBacktrace {
        // ...
    }
}

#[derive(Debug)]
struct Error {
    backtrace: MyBacktrace,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Example Error")
    }
}

impl std::error::Error for Error {
    fn provide<'a>(&'a self, request: &mut Request<'a>) {
        request
            .provide_ref::<MyBacktrace>(&self.backtrace);
    }
}

fn main() {
    let backtrace = MyBacktrace::new();
    let error = Error { backtrace };
    let dyn_error = &error as &dyn std::error::Error;
    let backtrace_ref = request_ref::<MyBacktrace>(dyn_error).unwrap();

    assert!(core::ptr::eq(&error.backtrace, backtrace_ref));
    assert!(request_ref::<MyLittleTeaPot>(dyn_error).is_none());
}

Implementations

impl dyn Error

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Returns true if the inner type is the same as T.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Returns some reference to the inner value if it is of type T, or None if it isn’t.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Returns some mutable reference to the inner value if it is of type T, or None if it isn’t.

impl dyn Error + Send

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

impl dyn Error + Sync + Send

pub fn is<T>(&self) -> bool

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

pub fn downcast_mut<T>(&mut self) -> Option<&mut T>

where T: Error + 'static,

Forwards to the method defined on the type dyn Error.

impl dyn Error

pub fn sources(&self) -> Source<'_>

🔬This is a nightly-only experimental API. (error_iter)

Returns an iterator starting with the current error and continuing with recursively calling Error::source.

If you want to omit the current error and only use its sources, use skip(1).

Examples

#![feature(error_iter)]
use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct A;

#[derive(Debug)]
struct B(Option<Box<dyn Error + 'static>>);

impl fmt::Display for A {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "A")
    }
}

impl fmt::Display for B {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "B")
    }
}

impl Error for A {}

impl Error for B {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        self.0.as_ref().map(|e| e.as_ref())
    }
}

let b = B(Some(Box::new(A)));

// let err : Box<Error> = b.into(); // or
let err = &b as &(dyn Error);

let mut iter = err.sources();

assert_eq!("B".to_string(), iter.next().unwrap().to_string());
assert_eq!("A".to_string(), iter.next().unwrap().to_string());
assert!(iter.next().is_none());
assert!(iter.next().is_none());

impl dyn Error

pub fn downcast<T>(self: Box<dyn Error>) -> Result<Box<T>, Box<dyn Error>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

impl dyn Error + Send

pub fn downcast<T>( self: Box<dyn Error + Send>, ) -> Result<Box<T>, Box<dyn Error + Send>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

impl dyn Error + Sync + Send

pub fn downcast<T>( self: Box<dyn Error + Sync + Send>, ) -> Result<Box<T>, Box<dyn Error + Sync + Send>>

where T: Error + 'static,

Attempts to downcast the box to a concrete type.

Trait Implementations

impl AsRef<dyn Error> for Box<Error>

fn as_ref(&self) -> &(dyn Error + 'static)

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<dyn Error> for UploadError

fn as_ref(&self) -> &(dyn Error + 'static)

Converts this type into a shared reference of the (usually inferred) input type.

impl ErrorReport for dyn Error

fn report(&self) -> Report<ReportHelper<'_>>

Return an object that displays the error and its causes

impl ErrorReport for dyn Error + Sync + Send

Implementation for anyhow::Error, which derefs to dyn StdError.

fn report(&self) -> Report<ReportHelper<'_>>

Return an object that displays the error and its causes

impl<'a> From<&str> for Box<dyn Error + 'a>

fn from(err: &str) -> Box<dyn Error + 'a>

Converts a str into a box of dyn Error.

Examples

use std::error::Error;

let a_str_error = "a str error";
let a_boxed_error = Box::<dyn Error>::from(a_str_error);
assert!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

impl<'a> From<&str> for Box<dyn Error + Sync + Send + 'a>

fn from(err: &str) -> Box<dyn Error + Sync + Send + 'a>

Converts a str into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;

let a_str_error = "a str error";
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_str_error);
assert!(
    size_of::<Box<dyn Error + Send + Sync>>() == size_of_val(&a_boxed_error))

impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + 'a>

fn from(err: Cow<'b, str>) -> Box<dyn Error + 'a>

Converts a Cow into a box of dyn Error.

Examples

use std::error::Error;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error>::from(a_cow_str_error);
assert!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Sync + Send + 'a>

fn from(err: Cow<'b, str>) -> Box<dyn Error + Sync + Send + 'a>

Converts a Cow into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_cow_str_error);
assert!(
    size_of::<Box<dyn Error + Send + Sync>>() == size_of_val(&a_boxed_error))

impl<'a, E> From<E> for Box<dyn Error + 'a>

where E: Error + 'a,

fn from(err: E) -> Box<dyn Error + 'a>

Converts a type of Error into a box of dyn Error.

Examples

use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct AnError;

impl fmt::Display for AnError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "An error")
    }
}

impl Error for AnError {}

let an_error = AnError;
assert!(0 == size_of_val(&an_error));
let a_boxed_error = Box::<dyn Error>::from(an_error);
assert!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

impl<'a, E> From<E> for Box<dyn Error + Sync + Send + 'a>

where E: Error + Send + Sync + 'a,

fn from(err: E) -> Box<dyn Error + Sync + Send + 'a>

Converts a type of Error + Send + Sync into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct AnError;

impl fmt::Display for AnError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "An error")
    }
}

impl Error for AnError {}

unsafe impl Send for AnError {}

unsafe impl Sync for AnError {}

let an_error = AnError;
assert!(0 == size_of_val(&an_error));
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(an_error);
assert!(
    size_of::<Box<dyn Error + Send + Sync>>() == size_of_val(&a_boxed_error))

impl<'a> From<String> for Box<dyn Error + 'a>

fn from(str_err: String) -> Box<dyn Error + 'a>

Converts a String into a box of dyn Error.

Examples

use std::error::Error;

let a_string_error = "a string error".to_string();
let a_boxed_error = Box::<dyn Error>::from(a_string_error);
assert!(size_of::<Box<dyn Error>>() == size_of_val(&a_boxed_error))

impl<'a> From<String> for Box<dyn Error + Sync + Send + 'a>

fn from(err: String) -> Box<dyn Error + Sync + Send + 'a>

Converts a String into a box of dyn Error + Send + Sync.

Examples

use std::error::Error;

let a_string_error = "a string error".to_string();
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_string_error);
assert!(
    size_of::<Box<dyn Error + Send + Sync>>() == size_of_val(&a_boxed_error))

impl Value for dyn Error

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Send

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Sync + Send

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Value for dyn Error + Sync

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

Implementors

impl !Error for &str

impl Error for RequestError

impl Error for DirectoryKeyProviderError

Available on crate feature restricted-discovery only.

impl Error for ClientError

impl Error for UploadError

impl Error for EstablishSessionError

impl Error for FatalError

impl Error for IntroRequestError

impl Error for IptError

impl Error for tor_hsservice::StartupError

impl Error for IptStoreError

impl Error for StateExpiryError

impl Error for IptEstablisherError

impl Error for ChooseIptError

impl Error for CreateIptError

impl Error for LogContentError

impl Error for ReplayError

impl Error for DescUploadRetryError

impl Error for ConfigBuildError

impl Error for tor_hsservice::internal_prelude::DirClientError

impl Error for ReconfigureError

impl Error for Void

impl Error for tor_hsservice::internal_prelude::fs::TryLockError

impl Error for Infallible

impl Error for FromBytesWithNulError

impl Error for core::slice::GetDisjointMutError

impl Error for VarError

impl Error for RecvTimeoutError

impl Error for std::sync::mpsc::TryRecvError

impl Error for TokioTpErr

impl Error for FromHexError

impl Error for liblzma::stream::Error

impl Error for DeserializerError

impl Error for SerializerError

impl Error for url::parser::ParseError

impl Error for rand::distr::bernoulli::BernoulliError

impl Error for rand::distr::uniform::Error

impl Error for rand::distr::weighted::Error

impl Error for rand::distributions::bernoulli::BernoulliError

impl Error for WeightedError

impl Error for TimerError

impl Error for !

impl Error for StreamWasFull

impl Error for InvalidIptLocalId

impl Error for InvalidNickname

impl Error for tor_hsservice::time_store::ParseError

impl Error for tor_hsservice::internal_prelude::fmt::Error

impl Error for Aborted

impl Error for UnorderedKeyError

impl Error for alloc::collections::TryReserveError

impl Error for FromVecWithNulError

impl Error for IntoStringError

impl Error for NulError

impl Error for alloc::string::FromUtf8Error

impl Error for FromUtf16Error

impl Error for LayoutError

impl Error for AllocError

impl Error for TryFromSliceError

impl Error for BorrowError

impl Error for BorrowMutError

impl Error for CharTryFromError

impl Error for ParseCharError

impl Error for DecodeUtf16Error

impl Error for TryFromCharError

impl Error for FromBytesUntilNulError

impl Error for core::net::parser::AddrParseError

impl Error for ParseFloatError

impl Error for core::num::error::ParseIntError

impl Error for core::num::error::TryFromIntError

impl Error for ParseBoolError

impl Error for core::str::error::Utf8Error

impl Error for TryFromFloatSecsError

impl Error for JoinPathsError

impl Error for StripPrefixError

impl Error for ExitStatusError

impl Error for std::sync::mpsc::RecvError

impl Error for std::thread::local::AccessError

impl Error for SystemTimeError

impl Error for async_executors::iface::timer::TimeoutError

impl Error for CompressError

impl Error for DecompressError

impl Error for getrandom::error::Error

impl Error for log::kv::error::Error

impl Error for log::ParseLevelError

impl Error for SetLoggerError

impl Error for openssl::error::Error

impl Error for ErrorStack

impl Error for openssl::ssl::error::Error

impl Error for X509VerifyResult

impl Error for serde::de::value::Error

impl Error for serde_json::error::Error

impl Error for Empty

impl Error for ReadError

impl Error for rand_core::error::Error

impl Error for OsError

impl Error for tor_hsservice::internal_prelude::io::Error

impl Error for WriterPanicked

impl Error for tor_hsservice::internal_prelude::mpsc::SendError

impl Error for tor_hsservice::internal_prelude::mpsc::TryRecvError

impl Error for Bug

impl Error for RequestFailedError

impl Error for SpawnError

impl Error for AccessError

impl Error for AcquireError

impl Error for AddrParseError

impl Error for AddrParseError

impl Error for AnyDelimiterCodecError

impl Error for ArtiPathSyntaxError

impl Error for ArtiPathUnavailableError

impl Error for AsAsciiStrError

impl Error for BadIso8601TimeSlug

impl Error for BadSlug

impl Error for BinaryError

impl Error for BlindingError

impl Error for BridgeAddrError

impl Error for BridgeParseError

impl Error for BuildError

impl Error for BuildError

impl Error for BuildError

impl Error for Canceled

impl Error for CaseFoldError

impl Error for CertEncodeError

impl Error for CertError

impl Error for CfgAddrError

impl Error for CfgPathError

impl Error for ChanTargetDecodeError

impl Error for ClosedUnexpectedly

impl Error for CompilerError

impl Error for ComponentRange

impl Error for ConfigError

impl Error for ConfigResolveError

impl Error for ConversionRange

impl Error for DatetimeParseError

impl Error for DecodeError

impl Error for DecryptionError

impl Error for DerConstraint

impl Error for DeserializeError

impl Error for DifferentVariant

impl Error for DynasmError

impl Error for EarlyDataError

impl Error for Ed25519CertConstructorError

impl Error for Elapsed

impl Error for EncodeError

impl Error for EncodeError

impl Error for EncodingError

impl Error for EncryptError

impl Error for EnterError

impl Error for ErasedSinkTrySendError

impl Error for Errno

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for Error

impl Error for ErrorCode

impl Error for ErrorSource

impl Error for Errors

impl Error for EstablishIntroSigError

impl Error for FileWatcherBuildError

impl Error for FloatIsNan

impl Error for Format

impl Error for FromStrError

impl Error for FromUtf8Error

impl Error for GenError

impl Error for GetDisjointMutError

impl Error for GroupInfoError

impl Error for GuardMgrConfigError

impl Error for GuardMgrError

impl Error for HsClientDescEncKeyParseError

impl Error for HsDescError

impl Error for HsIdParseError

impl Error for InstallRuntimeError

impl Error for IntroPointDescBuilderError

impl Error for InvalidBoolOrAuto

impl Error for InvalidBufferSize

impl Error for InvalidCertError

impl Error for InvalidDnsNameError

impl Error for InvalidEncodingError

impl Error for InvalidFormatDescription

impl Error for InvalidHeaderName

impl Error for InvalidHeaderValue

impl Error for InvalidKeyPathComponentValue

impl Error for InvalidLength

impl Error for InvalidLengthError

impl Error for InvalidListen

impl Error for InvalidMethod

impl Error for InvalidOutputSize

impl Error for InvalidSendmeTag

impl Error for InvalidStatusCode

impl Error for InvalidUri

impl Error for InvalidUriParts

impl Error for InvalidVariant

impl Error for JoinError

impl Error for JsonCodecError

impl Error for KeyMgrBuilderError

impl Error for KeyPathError

impl Error for KeyRejected

impl Error for KeystoreCorruptionError

impl Error for LabelError

impl Error for LengthDelimitedCodecError

impl Error for LinesCodecError

impl Error for ListenUnsupported

impl Error for MacError

impl Error for MatchError

impl Error for MaxRecursionReached

impl Error for MaxSizeReached

impl Error for MemoryReclaimedError

impl Error for MockNetError

impl Error for MpscOtherSinkTrySendError

impl Error for NetdirProviderShutdown

impl Error for NoAfUnixSocketSupport

impl Error for NonUtf8Error

impl Error for OidParseError

impl Error for OnionDirLookupError

impl Error for OtherError

impl Error for ParametersError

impl Error for Parse

impl Error for ParseError

impl Error for ParseError

impl Error for ParseError

impl Error for ParseError

impl Error for ParseFromDescription

impl Error for ParseIntError

impl Error for ParseLevelError

impl Error for ParseLevelFilterError

impl Error for PatternIDError

impl Error for PatternSetInsertError

impl Error for PickGuardError

impl Error for PolicyError

impl Error for PopError

impl Error for ProtocolSupportError

impl Error for ProxyError

impl Error for PtTargetInvalidSetting

impl Error for RecvError

impl Error for RecvError

impl Error for RecvError

impl Error for RecvError

impl Error for RecvError

impl Error for RelayIdError

impl Error for RelayLookupError

impl Error for ResolveError

impl Error for ReuniteError

impl Error for ReuniteError

impl Error for RuntimeError

impl Error for RuntimeErrorV1

impl Error for SerializeError

impl Error for SerializeError

impl Error for SetGlobalDefaultError

impl Error for SleepError

impl Error for SmallIndexError

impl Error for SolutionError

impl Error for SolutionErrorV1

impl Error for SpecificationError

impl Error for StartError

impl Error for StartupError

impl Error for StateIDError

impl Error for StreamIsolationBuilderError

impl Error for SyntheticError

impl Error for TimePeriodError

impl Error for TimeValidityError

impl Error for TimeoutError

impl Error for TimeoutError

impl Error for TimeoutError

impl Error for ToAsciiCharError

impl Error for ToStrError

impl Error for TomlError

impl Error for TooLargeBufferRequiredError

impl Error for TransportIdError

impl Error for Truncated

impl Error for TryAcquireError

impl Error for TryCurrentError

impl Error for TryFromIntError

impl Error for TryFromParsed

impl Error for TryGetError

impl Error for TryLockError

impl Error for TryRecvError

impl Error for TryRecvError

impl Error for TryRecvError

impl Error for TryRecvError

impl Error for TryRecvError

impl Error for TryRecvError

impl Error for TryReserveError

impl Error for TryReserveError

impl Error for UnexpectedNullPointerError

impl Error for UnicodeWordBoundaryError

impl Error for UnicodeWordError

impl Error for UninitializedFieldError

impl Error for UnitError

impl Error for UnixAddrNotAPath

impl Error for UnknownKeyTypeError

impl Error for Unspecified

impl Error for UnsupportedAddress

impl Error for UnsupportedAfUnixAddressType

impl Error for UnsupportedOperationError

impl Error for UnsupportedStreamOp

impl Error for Utf8Error

impl Error for VanguardMgrError

impl Error for VerifierBuilderError

impl Error for WrongVariantError

impl<'a, K, V> Error for alloc::collections::btree::map::entry::OccupiedError<'a, K, V>

where K: Debug + Ord, V: Debug,

impl<'a, K, V> Error for std::collections::hash::map::OccupiedError<'a, K, V>

where K: Debug, V: Debug,

impl<'a, T> Error for &'a T

where T: Error + ?Sized,

impl<A, S, V> Error for ConvertError<A, S, V>

where A: Display + Debug, S: Display + Debug, V: Display + Debug,

impl<CE> Error for SendError<CE>

where CE: Error + 'static, SendError<CE>: Debug + Display,

impl<E> Error for BackoffError<E>

where Self: Debug + Display,

impl<E> Error for Box<E>

where E: Error,

impl<E> Error for RetryError<E>

where E: Debug + AsRef<dyn Error>,

impl<E> Error for Err<E>

where E: Debug,

impl<E> Error for LookupError<E>

where E: Error + 'static,

impl<E> Error for LookupError<E>

where E: Error + 'static,

impl<E> Error for MultilineListBuilderError<E>

where E: Error + Clone + Send + Sync, MultilineListBuilderError<E>: Debug + Display,

impl<E> Error for ParseNotNanError<E>

where E: Debug + Error + 'static,

impl<E> Error for SubfieldBuildError<E>

where E: Error,

impl<Enum> Error for TryFromPrimitiveError<Enum>

where Enum: TryFromPrimitive,

impl<I> Error for Error<I>

where I: Debug + Display,

impl<I> Error for ExactlyOneError<I>

where I: Iterator + Debug, <I as Iterator>::Item: Debug,

impl<I> Error for InputError<I>

where I: Clone + Debug + Display + Sync + Send + 'static,

impl<I> Error for VerboseError<I>

where I: Debug + Display,

impl<I, C> Error for TreeError<I, C>

where I: Debug + Display + Sync + Send + 'static, C: Display + Debug,

impl<L, R> Error for Either<L, R>

where L: Error, R: Error,

Either implements Error if both L and R implement it.

Requires crate feature "std"

impl<O> Error for FromAsciiError<O>

where O: Any,

impl<R> Error for BitIdxError<R>

where R: BitRegister,

impl<S> Error for openssl::ssl::error::HandshakeError<S>

where S: Debug,

impl<S> Error for HandshakeError<S>

where S: Any + Debug,

impl<Src, Dst> Error for AlignmentError<Src, Dst>

where Src: Deref, Dst: KnownLayout + ?Sized,

impl<Src, Dst> Error for SizeError<Src, Dst>

where Src: Deref, Dst: KnownLayout + ?Sized,

impl<Src, Dst> Error for ValidityError<Src, Dst>

where Src: Deref, Dst: KnownLayout + TryFromBytes + ?Sized,

impl<T> Error for std::sync::mpmc::error::SendTimeoutError<T>

impl<T> Error for std::sync::mpsc::TrySendError<T>

impl<T> Error for std::sync::poison::TryLockError<T>

impl<T> Error for ThinBox<T>

where T: Error + ?Sized,

impl<T> Error for std::sync::mpsc::SendError<T>

impl<T> Error for PoisonError<T>

impl<T> Error for CapacityError<T>

where T: Any,

Requires features="std".

impl<T> Error for tor_hsservice::internal_prelude::mpsc::TrySendError<T>

where T: Any,

impl<T> Error for Arc<T>

where T: Error + ?Sized,

impl<T> Error for AsyncFdTryNewError<T>

impl<T> Error for BitPtrError<T>

where T: BitStore,

impl<T> Error for BitSpanError<T>

where T: BitStore,

impl<T> Error for ForcePushError<T>

where T: Debug,

impl<T> Error for MisalignError<T>

impl<T> Error for PollSendError<T>

where T: Debug,

impl<T> Error for PushError<T>

where T: Debug,

impl<T> Error for ReuniteError<T>

where T: Any,

impl<T> Error for SendError<T>

impl<T> Error for SendError<T>

impl<T> Error for SendError<T>

impl<T> Error for SendError<T>

impl<T> Error for SendError<T>

where T: Debug,

impl<T> Error for SendError<T>

where T: Debug,

impl<T> Error for SendTimeoutError<T>

impl<T> Error for SetError<T>

where T: Debug,

impl<T> Error for TryFromReprError<T>

where T: Debug,

impl<T> Error for TryIntoError<T>

where T: Debug,

impl<T> Error for TrySendError<T>

impl<T> Error for TrySendError<T>

impl<T> Error for TrySendError<T>

impl<T> Error for TrySendError<T>

where T: Debug,

impl<T> Error for TryUnwrapError<T>

where T: Debug,

impl<T, E> Error for TryChunksError<T, E>

where E: Debug + Display,

impl<T, E> Error for TryReadyChunksError<T, E>

where E: Debug + Display,

impl<T, Item> Error for ReuniteError<T, Item>

where T: Any,

impl<W> Error for IntoInnerError<W>

where W: Send + Debug,

impl Error for TimeFmtError

impl Error for GetProxyInfoError

impl Error for ErrorDetail

impl Error for TorAddrError

impl Error for Error

impl Error for Box<dyn ClientConnectionError>

impl Error for ErrorDetail

impl Error for Error

impl Error for ShutdownError

impl Error for UnexpectedReplyProblem

impl Error for BuilderError

impl Error for ConnectError

impl Error for InvalidRequestError

impl Error for ProtoError

impl Error for StreamError

impl Error for InvalidInput

impl Error for SendRequestError

impl Error for DecodeResponseError

impl Error for Utf8CStringFromBytesError

impl Error for UnexpectedReply

impl Error for ResponseWasFatal

impl Error for ConnectFailure

impl Error for CannotCancel

impl Error for AuthenticationFailure

impl Error for CancelError

impl Error for MgrDisappearedError

impl Error for ConnectionError

impl Error for RequestParseError

impl Error for RpcMgrError

impl Error for OneshotClientError

impl Error for Cancelled

impl Error for MissingFeaturesError

impl Error for RequestCancelled

impl Error for Error

impl Error for DomainError

impl Error for FromBytesError

impl Error for MismatchedPathError

impl Error for BridgeLineParseError

impl Error for Failed

impl Error for Error

impl Error for Error

impl Error for StartupError

impl Error for Error

impl Error for ReadOnlyStorageError

impl Error for ReceiverError

impl Error for ConnError

impl Error for DescriptorErrorDetail

impl Error for FailedAttemptError

impl Error for InvalidTarget

impl Error for StartupError

impl Error for ProofOfWorkError

impl Error for DescriptorError

impl Error for ProxyConfigError

impl Error for HandleRequestsError

impl Error for RequestFailed

impl Error for PtError

impl Error for PtClientParametersBuilderError

impl Error for PtCommonParametersBuilderError

impl Error for PtServerParametersBuilderError

impl Error for CookieAccessError

impl Error for HexError

impl Error for ParseError

impl Error for ConnectError

impl Error for ResolveError

impl Error for LoadError

impl Error for LoadOptionsBuilderError

impl Error for InvokeError

impl Error for InvalidRpcIdentifier

impl Error for LookupError

impl Error for SendUpdateError