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Add a regression test for issue-65384 #86688

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Jun 28, 2021
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Add a regression test for issue-65384 #86688

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16 changes: 16 additions & 0 deletions src/test/ui/type-alias-impl-trait/issue-65384.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
#![feature(min_type_alias_impl_trait)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]

trait MyTrait {}

impl MyTrait for () {}

type Bar = impl MyTrait;

impl MyTrait for Bar {}
//~^ ERROR: cannot implement trait on type alias impl trait

fn bazr() -> Bar { }

fn main() {}
14 changes: 14 additions & 0 deletions src/test/ui/type-alias-impl-trait/issue-65384.stderr
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error: cannot implement trait on type alias impl trait
--> $DIR/issue-65384.rs:11:1
|
LL | impl MyTrait for Bar {}
| ^^^^^^^^^^^^^^^^^^^^
|
note: type alias impl trait defined here
--> $DIR/issue-65384.rs:9:12
|
LL | type Bar = impl MyTrait;
| ^^^^^^^^^^^^

error: aborting due to previous error