Enum FuseError 

pub enum FuseError {
    Uncovered {
        node: String,
        op: String,
        mode: &'static str,
        rows: u64,
    },
    PolicyMissing {
        rule: String,
        key: String,
    },
    FormatConflict {
        edge: String,
        stored: String,
        rule: String,
        expected: String,
    },
    EmptySection(&'static str),
    Cycle(usize),
    ZeroRows,
    RowTable(String),
}

2026-09-28: Why no plan was produced.

Variants

Uncovered

2026-09-28: No applicable rule covers a node.

Fields

node: String

2026-09-28: Node id.

op: String

2026-09-28: Its op.

mode: &'static str

2026-09-28: Mode.

rows: u64

2026-09-28: Rows.

PolicyMissing

2026-09-28: A rule reads a setting the policy does not state.

Fields

rule: String

2026-09-28: Rule id.

key: String

2026-09-28: Setting.

FormatConflict

2026-09-28: A kernel reads an edge in a format its producer does not store.

Fields

edge: String

2026-09-28: Edge id.

stored: String

2026-09-28: Stored format.

rule: String

2026-09-28: Reading rule.

expected: String

2026-09-28: Format it reads.

EmptySection(&'static str)

2026-09-28: The mode’s section has no nodes.

Cycle(usize)

2026-09-28: The groups cannot be ordered (a rule set that fuses across a dependency).

ZeroRows

2026-09-28: rows is zero.

RowTable(String)

2026-09-30: A verify_batch plan without a row table, or a table in another mode.

Trait Implementations

impl Clone for FuseError

fn clone(&self) -> FuseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FuseError

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

Formats the value using the given formatter.

impl Display for FuseError

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

Formats the value using the given formatter.

impl Error for FuseError

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 From<FuseError> for LoadError

fn from(source: FuseError) -> Self

Converts to this type from the input type.

impl PartialEq for FuseError

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

impl StructuralPartialEq for FuseError