diff options
Diffstat (limited to 'tests/ui/traits/next-solver/overflow/recursion-limit-normalizes-to-constraints.rs')
-rw-r--r-- | tests/ui/traits/next-solver/overflow/recursion-limit-normalizes-to-constraints.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/overflow/recursion-limit-normalizes-to-constraints.rs b/tests/ui/traits/next-solver/overflow/recursion-limit-normalizes-to-constraints.rs new file mode 100644 index 000000000..03ef93dc2 --- /dev/null +++ b/tests/ui/traits/next-solver/overflow/recursion-limit-normalizes-to-constraints.rs @@ -0,0 +1,25 @@ +// compile-flags: -Znext-solver=coherence +// check-pass + +// A regression test for trait-system-refactor-initiative#70. + +trait Trait { + type Assoc; +} + +struct W<T: ?Sized>(*mut T); +impl<T: ?Sized> Trait for W<W<T>> +where + W<T>: Trait, +{ + type Assoc = (); +} + +trait NoOverlap {} +impl<T: Trait<Assoc = u32>> NoOverlap for T {} +// `Projection(<W<_> as Trait>::Assoc, u32)` should result in error even +// though applying the impl results in overflow. This is necessary to match +// the behavior of the old solver. +impl<T: ?Sized> NoOverlap for W<T> {} + +fn main() {} |