Enum DecodeError 

#[non_exhaustive]
pub enum DecodeError {
    UnexpectedEof,
    VarintTooLong,
    InvalidWireType(u32),
    InvalidFieldNumber,
    MessageTooLarge,
    WireTypeMismatch {
        field_number: u32,
        expected: u8,
        actual: u8,
    },
    InvalidUtf8,
    RecursionLimitExceeded,
    InvalidEndGroup(u32),
    InvalidMessageSet(&'static str),
}

An error that occurred while decoding a protobuf message.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnexpectedEof

The buffer ended before a complete value could be read.

VarintTooLong

A varint exceeded the maximum encoded length of 10 bytes.

InvalidWireType(u32)

The wire type in a tag was not a recognised protobuf wire type.

Carries the raw 3-bit value from the tag for diagnostic purposes.

InvalidFieldNumber

The field number decoded from a tag was zero, or the tag varint overflowed a u32 — both indicate a malformed message.

MessageTooLarge

The message or sub-message length exceeded the configured size limit.

By default, the limit is 2 GiB. Use DecodeOptions::with_max_message_size to set a lower limit for untrusted input.

WireTypeMismatch

The wire type of an incoming field did not match the type expected for that field number.

Carries the field number and the raw wire type values (as u8 to keep this type independent of the encoding module).

Fields

field_number: u32

expected: u8

actual: u8

InvalidUtf8

A string field contained bytes that are not valid UTF-8.

RecursionLimitExceeded

The message nesting depth exceeded the recursion limit.

InvalidEndGroup(u32)

An EndGroup tag was encountered with a field number that does not match the opening StartGroup tag, or an EndGroup was seen outside of a group.

InvalidMessageSet(&'static str)

A MessageSet Item group was malformed (missing or out-of-range type_id). Only occurs for messages declared with option message_set_wire_format = true.

Trait Implementations

impl Clone for DecodeError

fn clone(&self) -> DecodeError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DecodeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for DecodeError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for DecodeError

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

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

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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.

impl PartialEq for DecodeError

fn eq(&self, other: &DecodeError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DecodeError

impl StructuralPartialEq for DecodeError