error[E0320]: overflow while adding drop-check rules for FingerTree --> $DIR/dropck_no_diverge_on_nonregular_2.rs:23:9 | LL | let ft = | ^^ | = note: overflowed on FingerTree>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> error: aborting due to previous error For more information about this error, try `rustc --explain E0320`.