error[E0366]: Implementations of Drop cannot be specialized --> $DIR/issue-38868.rs:5:1 | LL | / impl Drop for List { //~ ERROR E0366 LL | | fn drop(&mut self) { LL | | panic!() LL | | } LL | | } | |_^ | note: Use same sequence of generic type and region parameters that is on the struct/enum definition --> $DIR/issue-38868.rs:1:1 | LL | / pub struct List { LL | | head: T, LL | | } | |_^ error: aborting due to previous error For more information about this error, try `rustc --explain E0366`.