error[E0491]: in type `&'a WithAssoc>`, reference has a longer lifetime than the data it references --> $DIR/regions-assoc-type-in-supertrait-outlives-container.rs:52:12 | LL | let _: &'a WithAssoc> = loop { }; //~ ERROR reference has a longer lifetime | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: the pointer is valid for the lifetime 'a as defined on the function body at 46:15 --> $DIR/regions-assoc-type-in-supertrait-outlives-container.rs:46:15 | LL | fn with_assoc<'a,'b>() { | ^^ note: but the referenced data is only valid for the lifetime 'b as defined on the function body at 46:18 --> $DIR/regions-assoc-type-in-supertrait-outlives-container.rs:46:18 | LL | fn with_assoc<'a,'b>() { | ^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0491`.