diff options
Diffstat (limited to 'src/test/ui/feature-gates/feature-gate-trait_upcasting.rs')
-rw-r--r-- | src/test/ui/feature-gates/feature-gate-trait_upcasting.rs | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-trait_upcasting.rs b/src/test/ui/feature-gates/feature-gate-trait_upcasting.rs new file mode 100644 index 000000000..e4102f1cf --- /dev/null +++ b/src/test/ui/feature-gates/feature-gate-trait_upcasting.rs @@ -0,0 +1,13 @@ +trait Foo {} + +trait Bar: Foo {} + +impl Foo for () {} + +impl Bar for () {} + +fn main() { + let bar: &dyn Bar = &(); + let foo: &dyn Foo = bar; + //~^ ERROR trait upcasting coercion is experimental [E0658] +} |