error[E0310]: the parameter type `T` may not live long enough --> $DIR/issue-53475.rs:10:1 | LL | impl CoerceUnsized> for Foo {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | | | the parameter type `T` must be valid for the static lifetime... | ...so that the type `T` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | impl CoerceUnsized> for Foo {} | +++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0310`.