Compiler crashes with stack overflow

[t4ccer]

What Git revision are you using?

v1.0.26-alpha compiled from 075668b5 and master as of today (b546e427) both crash

What operating system are you using, and which version?

• [ ] Linux / Ubuntu
• [x] Linux / Other
• [ ] macOS
• [ ] Windows

Describe what the problem is?

Compiler crashes when compiling following code

fn not(x: Bool) -> Bool {
   when x is {
        True -> False
        False -> True
   }
}

type Identity<t> = t

test foo() {
   let id: Identity<fn(Bool) -> Bool> = not
   expect id.fst(True) // (sic!)
}

        Error aiken::check::unknown::record_field

  × While trying to make sense of your code...

thread 'main' has overflowed its stack
fatal runtime error: stack overflow

If you modify foo to use 1st instead of fst (still incorrect, I know) it stack overflows again but with different error

  × While trying to make sense of your code...
  ╰─▶ I tripped over an attempt to access elements on something that isn't indexable.

    ╭─[/home/t4ccer/repos/github/aiken-lang/aiken/examples/acceptance_tests/foo/lib/tests.ak:18:1]
 18 │    let id: Identity<fn(Bool) -> Bool> = not
 19 │    expect id.1st(True)
    ·           ──────
 20 │ }
    ╰────

thread 'main' has overflowed its stack
fatal runtime error: stack overflow

What should be the expected behavior?

Compiler does not crash, tells user that you cannot access a field on type synonym of a function.

[KtorZ]

Nice catch, keeps them coming 🙏