Enum AssemblyError 

#[non_exhaustive]
pub enum AssemblyError {
    OverlappingPart {
        existing: Range<u64>,
        new: Range<u64>,
    },
    OutOfRange {
        begin: u64,
        end: u64,
        total_size: u64,
    },
    CrcMismatch {
        expected: u32,
        actual: u32,
    },
    Incomplete {
        missing: Vec<Range<u64>>,
    },
    DataLengthMismatch {
        declared_range_len: usize,
        actual_data_len: usize,
    },
    TotalSizeTooLarge {
        total_size: u64,
    },
    MalformedPartRange,
    InconsistentCrc {
        first: u32,
        new: u32,
    },
}

Errors produced by crate::Assembler operations.

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.

OverlappingPart

A part’s byte range overlaps with an already-accepted part.

yEnc parts must cover non-overlapping, contiguous byte ranges of the final file. When two parts claim the same byte(s), the second is rejected. existing is the range already stored; new is the range that was rejected.

Caller action: de-duplicate incoming articles (the same article may arrive multiple times from different Usenet servers).

Fields

existing: Range<u64>

new: Range<u64>

OutOfRange

A part’s byte range falls outside [0, total_size).

Either the =ypart begin=/end= values were invalid, or the wrong total_size was passed to Assembler::new.

Fields

begin: u64

end: u64

total_size: u64

CrcMismatch

Whole-file CRC32 mismatch on Assembler::finish.

The reassembled bytes hash to a different CRC32 than the expected value set via Assembler::set_expected_crc32.

Fields

expected: u32

actual: u32

Incomplete

Assembler::finish was called before all byte ranges were covered.

missing lists the 0-based byte ranges that have not been received. Call Assembler::is_complete before finish() to avoid this error.

Fields

missing: Vec<Range<u64>>

DataLengthMismatch

A decoded part’s data length does not match its declared =ypart begin=/end= range.

This indicates a corrupt or malformed article: the decoded payload is a different size than the byte range it claims to cover.

Fields

declared_range_len: usize

The byte count implied by the begin/end range header.

actual_data_len: usize

The actual number of decoded bytes.

TotalSizeTooLarge

total_size exceeds the built-in safety cap or the addressable memory on this platform.

Assembler::new rejects any total_size greater than MAX_TOTAL_SIZE (512 MiB) to prevent an adversarial =ybegin size= field from forcing a multi-GiB allocation. On 32-bit targets the platform usize limit applies first.

Fields

total_size: u64

The value that was rejected.

MalformedPartRange

A decoded part has part_begin set but part_end absent, or vice versa.

yEnc =ypart begin=/end= always provides both values or neither. A DecodedPart with only one of the two fields set indicates a corrupt or incorrectly constructed part.

InconsistentCrc

Two parts carry conflicting whole-file CRC32 values.

Assembler::add_part auto-extracts the crc32= whole-file CRC from each part that carries it. If a later part reports a different value than one already recorded, the series is internally inconsistent and the assembly must be aborted.

first is the CRC recorded from an earlier part; new is the conflicting value from the current part.

Fields

first: u32

new: u32

Trait Implementations

impl Debug for AssemblyError

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

Formats the value using the given formatter.

impl Display for AssemblyError

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

Formats the value using the given formatter.

impl Error for AssemblyError

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 AssemblyError

fn eq(&self, other: &AssemblyError) -> 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 AssemblyError

impl StructuralPartialEq for AssemblyError