diff options
Diffstat (limited to 'tests/ui/traits/next-solver/dont-coerce-infer-to-dyn.rs')
-rw-r--r-- | tests/ui/traits/next-solver/dont-coerce-infer-to-dyn.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/dont-coerce-infer-to-dyn.rs b/tests/ui/traits/next-solver/dont-coerce-infer-to-dyn.rs new file mode 100644 index 000000000..da07869f3 --- /dev/null +++ b/tests/ui/traits/next-solver/dont-coerce-infer-to-dyn.rs @@ -0,0 +1,17 @@ +// compile-flags: -Znext-solver +// check-pass + +use std::fmt::Display; +use std::rc::Rc; + +fn mk<T: ?Sized>(t: Option<&T>) -> Rc<T> { + todo!() +} + +fn main() { + let mut x = None; + let y = mk(x); + // Don't treat the line below as a unsize coercion `Rc<?0> ~> Rc<dyn Display>` + let z: Rc<dyn Display> = y; + x = Some(&1 as &dyn Display); +} |