| // Test that we don't assume that type aliases have the same type parameters |
| // as the type they alias and then panic when we see this. |
| |
| type A<'a> = &'a isize; |
| type B<'a> = Box<A<'a>>; |
| |
| struct C<'a> { |
| f: Box<B<'a>> |
| } |
| |
| trait FromBox<'a> { |
| fn from_box(b: Box<B>) -> Self; |
| } |
| |
| impl<'a> FromBox<'a> for C<'a> { |
| fn from_box(b: Box<B>) -> Self { |
| C { f: b } //~ ERROR |
| } |
| } |
| |
| trait FromTuple<'a> { |
| fn from_tuple( b: (B,)) -> Self; |
| } |
| |
| impl<'a> FromTuple<'a> for C<'a> { |
| fn from_tuple(b: (B,)) -> Self { |
| C { f: Box::new(b.0) } //~ ERROR |
| } |
| } |
| |
| fn main() {} |