Enum ZstdDictDiscoveryError 

pub enum ZstdDictDiscoveryError {
    InvalidHash {
        hash: String,
    },
    NotFound {
        url: String,
    },
    HashMismatch {
        url: String,
        expected: String,
        actual: String,
    },
    Http {
        url: String,
        source: Error,
    },
}

Errors raised by the v0.5 zstd-dictionary discovery surface.

The discovery path is hard-fail by design (no silent fallback to identity bytes) — see spec/WELL_KNOWN_DISCOVERY.md § Resolution failures. Silent dict-load failure was the v0.4.1 sglang COPY-dicts regression class this surface eliminates.

Variants

InvalidHash

Hash input was not sha256:<64 hex> or bare <64 hex>.

Fields

hash: String

NotFound

.well-known/codec/dicts/<hex>.zstd returned HTTP 404.

Fields

url: String

HashMismatch

Fetched bytes did not hash to the <hex> path component in the URL. Treat as byte-tampering: never decompress.

Fields

url: String

expected: String

actual: String

Http

HTTP transport-layer failure (reqwest). Surfaced separately from 404 so callers can distinguish “origin doesn’t publish this dict” from “we couldn’t reach the origin at all.”

Fields

url: String

source: Error

Trait Implementations

impl Debug for ZstdDictDiscoveryError

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

Formats the value using the given formatter.

impl Display for ZstdDictDiscoveryError

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

Formats the value using the given formatter.

impl Error for ZstdDictDiscoveryError

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.