error[E0015]: cannot call non-const closure in constant functions
  --> $DIR/normalize-tait-in-const.rs:26:5
   |
LL |     fun(filter_positive());
   |     ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: consider further restricting this bound
   |
LL | const fn with_positive<F: ~const for<'a> Fn(&'a Alias<'a>) + ~const Destruct + ~const std::ops::Fn<(&Alias<'_>,)>>(fun: F) {
   |                                                                              ++++++++++++++++++++++++++++++++++++

error[E0493]: destructor of `F` cannot be evaluated at compile-time
  --> $DIR/normalize-tait-in-const.rs:25:79
   |
LL | const fn with_positive<F: ~const for<'a> Fn(&'a Alias<'a>) + ~const Destruct>(fun: F) {
   |                                                                               ^^^ the destructor for this type cannot be evaluated in constant functions
LL |     fun(filter_positive());
LL | }
   | - value is dropped here

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0015, E0493.
For more information about an error, try `rustc --explain E0015`.