diff options
Diffstat (limited to 'src/test/ui/traits/assoc-type-in-superbad.rs')
-rw-r--r-- | src/test/ui/traits/assoc-type-in-superbad.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/traits/assoc-type-in-superbad.rs b/src/test/ui/traits/assoc-type-in-superbad.rs new file mode 100644 index 000000000..579ce7cf7 --- /dev/null +++ b/src/test/ui/traits/assoc-type-in-superbad.rs @@ -0,0 +1,16 @@ +// Test case where an associated type is referenced from within the +// supertrait definition, and the impl makes the wrong +// associations. Issue #20220. + +use std::vec::IntoIter; + +pub trait Foo: Iterator<Item=<Self as Foo>::Key> { + type Key; +} + +impl Foo for IntoIter<i32> { + type Key = u32; //~ ERROR type mismatch +} + +fn main() { +} |