| // check that static methods don't get to assume their trait-ref |
| // is well-formed. |
| // FIXME(#27579): this is just a bug. However, our checking with |
| // static inherent methods isn't quite working - need to |
| // fix that before removing the check. |
| |
| trait Foo<'a, 'b, T>: Sized { |
| fn make_me() -> Self { loop {} } |
| fn static_evil(u: &'b u32) -> &'a u32; |
| } |
| |
| struct Evil<'a, 'b: 'a>(Option<&'a &'b ()>); |
| |
| impl<'a, 'b> Foo<'a, 'b, Evil<'a, 'b>> for () { |
| fn make_me() -> Self { } |
| fn static_evil(u: &'b u32) -> &'a u32 { |
| u //~ ERROR E0312 |
| } |
| } |
| |
| struct IndirectEvil<'a, 'b: 'a>(Option<&'a &'b ()>); |
| |
| impl<'a, 'b> Foo<'a, 'b, ()> for IndirectEvil<'a, 'b> { |
| fn make_me() -> Self { IndirectEvil(None) } |
| fn static_evil(u: &'b u32) -> &'a u32 { |
| let me = Self::make_me(); //~ ERROR lifetime bound not satisfied |
| loop {} // (`me` could be used for the lifetime transmute). |
| } |
| } |
| |
| impl<'a, 'b> Evil<'a, 'b> { |
| fn inherent_evil(u: &'b u32) -> &'a u32 { |
| u //~ ERROR E0312 |
| } |
| } |
| |
| // while static methods don't get to *assume* this, we still |
| // *check* that they hold. |
| |
| fn evil<'a, 'b>(b: &'b u32) -> &'a u32 { |
| <()>::static_evil(b) //~ ERROR cannot infer an appropriate lifetime |
| } |
| |
| fn indirect_evil<'a, 'b>(b: &'b u32) -> &'a u32 { |
| <IndirectEvil>::static_evil(b) |
| //~^ ERROR cannot infer an appropriate lifetime |
| } |
| |
| fn inherent_evil<'a, 'b>(b: &'b u32) -> &'a u32 { |
| <Evil>::inherent_evil(b) // bug? shouldn't this be an error |
| } |
| |
| |
| fn main() {} |