pub enum UndefinedBehaviorInfo<'tcx> {
Show 32 variants Ub(String), Custom(CustomSubdiagnostic<'tcx>), ValidationError(ValidationErrorInfo<'tcx>), Unreachable, BoundsCheckFailed { len: u64, index: u64, }, DivisionByZero, RemainderByZero, DivisionOverflow, RemainderOverflow, PointerArithOverflow, InvalidMeta(InvalidMetaKind), UnterminatedCString(Pointer<AllocId>), PointerUseAfterFree(AllocId, CheckInAllocMsg), PointerOutOfBounds { alloc_id: AllocId, alloc_size: Size, ptr_offset: i64, ptr_size: Size, msg: CheckInAllocMsg, }, DanglingIntPointer(u64, CheckInAllocMsg), AlignmentCheckFailed { required: Align, has: Align, }, WriteToReadOnly(AllocId), DerefFunctionPointer(AllocId), DerefVTablePointer(AllocId), InvalidBool(u8), InvalidChar(u32), InvalidTag(Scalar<AllocId>), InvalidFunctionPointer(Pointer<AllocId>), InvalidVTablePointer(Pointer<AllocId>), InvalidStr(Utf8Error), InvalidUninitBytes(Option<(AllocId, BadBytesAccess)>), DeadLocal, ScalarSizeMismatch(ScalarSizeMismatch), UninhabitedEnumVariantWritten(VariantIdx), UninhabitedEnumVariantRead(VariantIdx), AbiMismatchArgument { caller_ty: Ty<'tcx>, callee_ty: Ty<'tcx>, }, AbiMismatchReturn { caller_ty: Ty<'tcx>, callee_ty: Ty<'tcx>, },
}
Expand description

Error information for when the program caused Undefined Behavior.

Variants§

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Ub(String)

Free-form case. Only for errors that are never caught! Used by miri

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Custom(CustomSubdiagnostic<'tcx>)

A custom (free-form) fluent-translated error, created by err_ub_custom!.

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ValidationError(ValidationErrorInfo<'tcx>)

Validation error.

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Unreachable

Unreachable code was executed.

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BoundsCheckFailed

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§len: u64
§index: u64

A slice/array index projection went out-of-bounds.

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DivisionByZero

Something was divided by 0 (x / 0).

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RemainderByZero

Something was “remainded” by 0 (x % 0).

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DivisionOverflow

Signed division overflowed (INT_MIN / -1).

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RemainderOverflow

Signed remainder overflowed (INT_MIN % -1).

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PointerArithOverflow

Overflowing inbounds pointer arithmetic.

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InvalidMeta(InvalidMetaKind)

Invalid metadata in a wide pointer

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UnterminatedCString(Pointer<AllocId>)

Reading a C string that does not end within its allocation.

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PointerUseAfterFree(AllocId, CheckInAllocMsg)

Using a pointer after it got freed.

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PointerOutOfBounds

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§alloc_id: AllocId
§alloc_size: Size
§ptr_offset: i64
§ptr_size: Size

Used a pointer outside the bounds it is valid for. (If ptr_size > 0, determines the size of the memory range that was expected to be in-bounds.)

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DanglingIntPointer(u64, CheckInAllocMsg)

Using an integer as a pointer in the wrong way.

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AlignmentCheckFailed

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§required: Align
§has: Align

Used a pointer with bad alignment.

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WriteToReadOnly(AllocId)

Writing to read-only memory.

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DerefFunctionPointer(AllocId)

Trying to access the data behind a function pointer.

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DerefVTablePointer(AllocId)

Trying to access the data behind a vtable pointer.

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InvalidBool(u8)

Using a non-boolean u8 as bool.

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InvalidChar(u32)

Using a non-character u32 as character.

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InvalidTag(Scalar<AllocId>)

The tag of an enum does not encode an actual discriminant.

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InvalidFunctionPointer(Pointer<AllocId>)

Using a pointer-not-to-a-function as function pointer.

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InvalidVTablePointer(Pointer<AllocId>)

Using a pointer-not-to-a-vtable as vtable pointer.

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InvalidStr(Utf8Error)

Using a string that is not valid UTF-8,

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InvalidUninitBytes(Option<(AllocId, BadBytesAccess)>)

Using uninitialized data where it is not allowed.

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DeadLocal

Working with a local that is not currently live.

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ScalarSizeMismatch(ScalarSizeMismatch)

Data size is not equal to target size.

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UninhabitedEnumVariantWritten(VariantIdx)

A discriminant of an uninhabited enum variant is written.

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UninhabitedEnumVariantRead(VariantIdx)

An uninhabited enum variant is projected.

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AbiMismatchArgument

Fields

§caller_ty: Ty<'tcx>
§callee_ty: Ty<'tcx>

ABI-incompatible argument types.

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AbiMismatchReturn

Fields

§caller_ty: Ty<'tcx>
§callee_ty: Ty<'tcx>

ABI-incompatible return types.

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for UndefinedBehaviorInfo<'tcx>

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impl<'tcx> !Send for UndefinedBehaviorInfo<'tcx>

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impl<'tcx> !Sync for UndefinedBehaviorInfo<'tcx>

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impl<'tcx> Unpin for UndefinedBehaviorInfo<'tcx>

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impl<'tcx> !UnwindSafe for UndefinedBehaviorInfo<'tcx>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 112 bytes

Size for each variant:

  • Ub: 32 bytes
  • Custom: 32 bytes
  • ValidationError: 112 bytes
  • Unreachable: 0 bytes
  • BoundsCheckFailed: 24 bytes
  • DivisionByZero: 0 bytes
  • RemainderByZero: 0 bytes
  • DivisionOverflow: 0 bytes
  • RemainderOverflow: 0 bytes
  • PointerArithOverflow: 0 bytes
  • InvalidMeta: 2 bytes
  • UnterminatedCString: 24 bytes
  • PointerUseAfterFree: 24 bytes
  • PointerOutOfBounds: 48 bytes
  • DanglingIntPointer: 24 bytes
  • AlignmentCheckFailed: 3 bytes
  • WriteToReadOnly: 16 bytes
  • DerefFunctionPointer: 16 bytes
  • DerefVTablePointer: 16 bytes
  • InvalidBool: 2 bytes
  • InvalidChar: 8 bytes
  • InvalidTag: 32 bytes
  • InvalidFunctionPointer: 24 bytes
  • InvalidVTablePointer: 24 bytes
  • InvalidStr: 24 bytes
  • InvalidUninitBytes: 48 bytes
  • DeadLocal: 0 bytes
  • ScalarSizeMismatch: 24 bytes
  • UninhabitedEnumVariantWritten: 8 bytes
  • UninhabitedEnumVariantRead: 8 bytes
  • AbiMismatchArgument: 24 bytes
  • AbiMismatchReturn: 24 bytes