error[E0381]: used binding `s` isn't initialized
  --> $DIR/const-generic-default-wont-borrowck.rs:2:26
   |
LL |     let s: &'static str; s.len()
   |         -                ^ `*s` used here but it isn't initialized
   |         |
   |         binding declared here but left uninitialized
   |
help: consider assigning a value
   |
LL |     let s: &'static str = todo!(); s.len()
   |                         +++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0381`.