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double ICE: assertion failed: `(left == right)' / attempt to subtract with overflow #105449
Description
Code
// Regression test for #66768.
// check-pass
#![allow(dead_code)]
//-^ "dead code" is needed to reproduce the issue.
use std::marker::PhantomData;
use std::ops::{Add, Mul};
fn problematic_function<Space>(material_surface_element: Edge2dElement)
where
DefaultAllocator: FiniteElementAllocator<DimU1, Space>,
{
let _: Point2<f64> = material_surface_element.map_reference_coords().into();
}
impl<T> ArrayLength<T> for UTerm {
type ArrayType = ();
}
impl<T, N: ArrayLength<T>> ArrayLength<T> for UInt<N, B0> {
type ArrayType = GenericArrayImplEven<T, N>;
}
impl<T, N: ArrayLength<T>> ArrayLength<T> for UInt<N, B1> {
type ArrayType = GenericArrayImplOdd<T, N>;
}
impl<U> Add<U> for UTerm {
type Output = U;
fn add(self, _: U) -> Self::Output {
unimplemented!()
}
}
impl<Ul, Ur> Add<UInt<Ur, B1>> for UInt<Ul, B0>
where
Ul: Add<Ur>,
{
type Output = UInt<Sum<Ul, Ur>, B1>;
fn add(self, _: UInt<Ur, B1>) -> Self::Output {
unimplemented!()
}
}
impl<U> Mul<U> for UTerm {
type Output = UTerm;
fn mul(self, _: U) -> Self {
unimplemented!()
}
}
impl<Ul, B, Ur> Mul<UInt<Ur, B>> for UInt<Ul, B0>
where
Ul: Mul<UInt<Ur, B>>,
{
type Output = UInt<Prod<Ul, UInt<Ur, B>>, B0>;
fn mul(self, _: UInt<Ur, B>) -> Self::Output {
unimplemented!()
}
}
impl<Ul, B, Ur> Mul<UInt<Ur, B>> for UInt<Ul, B1>
where
Ul: Mul<UInt<Ur, B>>,
UInt<Prod<Ul, UInt<Ur, B>>, B0>: Add<UInt<Ur, B>>,
{
type Output = Sum<UInt<Prod<Ul, UInt<Ur, B>>, B0>, UInt<Ur, B>>;
fn mul(self, _: UInt<Ur, B>) -> Self::Output {
unimplemented!()
}
}
impl<N, R, C> Allocator<N, R, C> for DefaultAllocator
where
R: DimName,
C: DimName,
R::Value: Mul<C::Value>,
Prod<R::Value, C::Value>: ArrayLength<N>,
{
type Buffer = ArrayStorage<N, R, C>;
fn allocate_uninitialized(_: R, _: C) -> Self::Buffer {
unimplemented!()
}
fn allocate_from_iterator<I>(_: R, _: C, _: I) -> Self::Buffer {
unimplemented!()
}
}
impl<N, C> Allocator<N, Dynamic, C> for DefaultAllocator {
type Buffer = VecStorage<N, Dynamic, C>;
fn allocate_uninitialized(_: Dynamic, _: C) -> Self::Buffer {
unimplemented!()
}
fn allocate_from_iterator<I>(_: Dynamic, _: C, _: I) -> Self::Buffer {
unimplemented!()
}
}
impl DimName for DimU1 {
type Value = U1;
fn name() -> Self {
unimplemented!()
}
}
impl DimName for DimU2 {
type Value = U2;
fn name() -> Self {
unimplemented!()
}
}
impl<N, D> From<VectorN<N, D>> for Point<N, D>
where
DefaultAllocator: Allocator<N, D>,
{
fn from(_: VectorN<N, D>) -> Self {
unimplemented!()
}
}
impl<GeometryDim, NodalDim> FiniteElementAllocator<GeometryDim, NodalDim> for DefaultAllocator where
DefaultAllocator: Allocator<f64, GeometryDim> + Allocator<f64, NodalDim>
{
}
impl ReferenceFiniteElement for Edge2dElement {
type NodalDim = DimU1;
}
impl FiniteElement<DimU2> for Edge2dElement {
fn map_reference_coords(&self) -> Vector2<f64> {
unimplemented!()
}
}
type Owned<N, R, C> = <DefaultAllocator as Allocator<N, R, C>>::Buffer;
type MatrixMN<N, R, C> = Matrix<N, R, C, Owned<N, R, C>>;
type VectorN<N, D> = MatrixMN<N, D, DimU1>;
type Vector2<N> = VectorN<N, DimU2>;
type Point2<N> = Point<N, DimU2>;
type U1 = UInt<UTerm, B1>;
type U2 = UInt<UInt<UTerm, B1>, B0>;
type Sum<A, B> = <A as Add<B>>::Output;
type Prod<A, B> = <A as Mul<B>>::Output;
struct GenericArray<T, U: ArrayLength<T>> {
_data: U::ArrayType,
}
struct GenericArrayImplEven<T, U> {
_parent2: U,
_marker: T,
}
struct GenericArrayImplOdd<T, U> {
_parent2: U,
_data: T,
}
struct B0;
struct B1;
struct UTerm;
struct UInt<U, B> {
_marker: PhantomData<(U, B)>,
}
struct DefaultAllocator;
struct Dynamic;
struct DimU1;
struct DimU2;
struct Matrix<N, R, C, S> {
_data: S,
_phantoms: PhantomData<(N, R, C)>,
}
struct ArrayStorage<N, R, C>
where
R: DimName,
C: DimName,
R::Value: Mul<C::Value>,
Prod<R::Value, C::Value>: ArrayLength<N>,
{
_data: GenericArray<N, Prod<R::Value, C::Value>>,
}
struct VecStorage<N, R, C> {
_data: N,
_nrows: R,
_ncols: C,
}
struct Point<N, D>
where
DefaultAllocator: Allocator<N, D>,
{
_coords: VectorN<N, D>,
}
struct Edge2dElement;
trait ArrayLength<T> {
type ArrayType;
}
trait Allocator<Scalar, R, C = DimU1> {
type Buffer;
fn allocate_uninitialized(nrows: R, ncols: C) -> Self::Buffer;
fn allocate_from_iterator<I>(nrows: R, ncols: C, iter: I) -> Self::Buffer;
}
trait DimName {
type Value;
fn name() -> Self;
}
trait FiniteElementAllocator<GeometryDim, NodalDim>:
Allocator<f64, GeometryDim> + Allocator<f64, NodalDim>
{
}
trait ReferenceFiniteElement {
type NodalDim;
}
trait FiniteElement<GeometryDim>: ReferenceFiniteElement
where
DefaultAllocator: FiniteElementAllocator<GeometryDim, Self::NodalDim>,
{
fn map_reference_coords(&self) -> VectorN<f64, GeometryDim>;
}
fn main() {}Meta
rustc --version --verbose:
d43674e2c9b1a7b134ef76378c30e822c75c9aa1
Error output
rustc -Zunstable-options ./issue-66768.rs
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Category: This is a bug.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Relevant to the compiler team, which will review and decide on the PR/issue.This issue requires a build of rustc or tooling with debug-assertions in some wayThis issue requires a nightly compiler in some way. When possible, use a F-* label instead.
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matthiaskrgr commentedon Dec 8, 2022
Backtrace
jruderman commentedon Dec 8, 2022
@rustbot label +requires-debug-assertions
jruderman commentedon Dec 12, 2022
Reduced from 205 lines to 56 lines:
Error output with
rustc +stage1 -Zunstable-options:Rollup merge of rust-lang#105561 - TaKO8Ki:fix-105449, r=fee1-dead
Rollup merge of rust-lang#105561 - TaKO8Ki:fix-105449, r=fee1-dead