diff options
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/traits/impl-evaluation-order.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/traits/impl-evaluation-order.rs b/src/test/ui/traits/impl-evaluation-order.rs new file mode 100644 index 000000000..57809d89a --- /dev/null +++ b/src/test/ui/traits/impl-evaluation-order.rs @@ -0,0 +1,39 @@ +// Regression test for #79902 + +// Check that evaluation (which is used to determine whether to copy a type in +// MIR building) evaluates bounds from normalizing an impl after evaluating +// any bounds on the impl. + +// check-pass + +trait A { + type B; +} +trait M {} + +struct G<T, U>(*const T, *const U); + +impl<T, U> Clone for G<T, U> { + fn clone(&self) -> Self { + G { ..*self } + } +} + +impl<T, U> Copy for G<T, U::B> +where + T: A<B = U>, + U: A, +{ +} + +impl A for () { + type B = (); +} + +fn is_m<T: M>(_: T) {} + +fn main() { + let x = G(&(), &()); + drop(x); + drop(x); +} |