Type aliases cannot be used in main function signature

[TomAFrench]

Aim

I'm trying to compile the program

type Foo = u8;

fn main(x: Foo) {

}

Expected Behavior

Should compile successfully

Bug

Compilation fails with error

error: Only sized types may be used in the entry point to a program
  ┌─ /home/tom/Programming/aztec/noir/temp/src/main.nr:3:12
  │
3 │ fn main(x: Foo) {
  │            --- Slices, references, or any type containing them may not be used in main or a contract function
  │

To Reproduce

Project Impact

None

Impact Context

No response

Workaround

None

Workaround Description

No response

Additional Context

No response

Installation Method

None

Nargo Version

No response

NoirJS Version

No response

Would you like to submit a PR for this Issue?

None

Support Needs

No response

[jfecher]

This is due to the check here: https://github.com/noir-lang/noir/blob/master/compiler/noirc_frontend/src/hir_def/types.rs#L706-L709