Enum halo2_proofs::dev::VerifyFailure
source · [−]pub enum VerifyFailure {
CellNotAssigned {
gate: Gate,
region: Region,
column: Column<Any>,
offset: isize,
},
ConstraintNotSatisfied {
constraint: Constraint,
location: FailureLocation,
cell_values: Vec<(VirtualCell, String)>,
},
ConstraintPoisoned {
constraint: Constraint,
},
Lookup {
lookup_index: usize,
location: FailureLocation,
},
Permutation {
column: Column,
row: usize,
},
}
Expand description
The reasons why a particular circuit is not satisfied.
Variants
CellNotAssigned
Fields
gate: Gate
The index of the active gate.
region: Region
The region in which this cell should be assigned.
offset: isize
The offset (relative to the start of the region) at which this cell should be
assigned. This may be negative (for example, if a selector enables a gate at
offset 0, but the gate uses Rotation::prev()
).
A cell used in an active gate was not assigned to.
ConstraintNotSatisfied
Fields
constraint: Constraint
The polynomial constraint that is not satisfied.
location: FailureLocation
The location at which this constraint is not satisfied.
FailureLocation::OutsideRegion
is usually caused by a constraint that does
not contain a selector, and as a result is active on every row.
cell_values: Vec<(VirtualCell, String)>
The values of the virtual cells used by this constraint.
A constraint was not satisfied for a particular row.
ConstraintPoisoned
Fields
constraint: Constraint
The polynomial constraint that is not satisfied.
A constraint was active on an unusable row, and is likely missing a selector.
Lookup
Fields
lookup_index: usize
The index of the lookup that is not satisfied. These indices are assigned in
the order in which ConstraintSystem::lookup
is called during
Circuit::configure
.
location: FailureLocation
The location at which the lookup is not satisfied.
FailureLocation::InRegion
is most common, and may be due to the intentional
use of a lookup (if its inputs are conditional on a complex selector), or an
unintentional lookup constraint that overlaps the region (indicating that the
lookup’s inputs should be made conditional).
FailureLocation::OutsideRegion
is uncommon, and could mean that:
- The input expressions do not correctly constrain a default value that exists in the table when the lookup is not being used.
- The input expressions use a column queried at a non-zero
Rotation
, and the lookup is active on a row adjacent to an unrelated region.
A lookup input did not exist in its corresponding table.
Permutation
Fields
column: Column
The column in which this permutation is not satisfied.
row: usize
The row on which this permutation is not satisfied.
A permutation did not preserve the original value of a cell.
Trait Implementations
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for VerifyFailure
impl Send for VerifyFailure
impl Sync for VerifyFailure
impl Unpin for VerifyFailure
impl UnwindSafe for VerifyFailure
Blanket Implementations
Mutably borrows from an owned value. Read more
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