error[E0015]: `?` is not allowed on `Option<()>` in constant functions
  --> $DIR/hir-const-check.rs:14:9
   |
LL |         Some(())?;
   |         ^^^^^^^^^
   |
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants

error[E0015]: `?` is not allowed on `Option<()>` in constant functions
  --> $DIR/hir-const-check.rs:14:9
   |
LL |         Some(())?;
   |         ^^^^^^^^^
   |
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants

error: aborting due to 2 previous errors

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