error: overly complex generic constant
  --> $DIR/issue-90318.rs:14:8
   |
LL |     If<{ TypeId::of::<T>() != TypeId::of::<()>() }>: True,
   |        ^^-----------------^^^^^^^^^^^^^^^^^^^^^^^^
   |          |
   |          borrowing is not supported in generic constants
   |
   = help: consider moving this anonymous constant into a `const` function
   = note: this operation may be supported in the future

error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
  --> $DIR/issue-90318.rs:14:10
   |
LL |     If<{ TypeId::of::<T>() != TypeId::of::<()>() }>: True,
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: overly complex generic constant
  --> $DIR/issue-90318.rs:22:8
   |
LL |     If<{ TypeId::of::<T>() != TypeId::of::<()>() }>: True,
   |        ^^-----------------^^^^^^^^^^^^^^^^^^^^^^^^
   |          |
   |          borrowing is not supported in generic constants
   |
   = help: consider moving this anonymous constant into a `const` function
   = note: this operation may be supported in the future

error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
  --> $DIR/issue-90318.rs:22:10
   |
LL |     If<{ TypeId::of::<T>() != TypeId::of::<()>() }>: True,
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0015`.