let-expression-in-pattern.yaml

src: |
  f n (let exp = x^2 in exp n) = True
ghc: |
  test.hs:1:6: error: [GHC-78892] (let ... in ...)-syntax in pattern
aihc: |
  test.hs:1:6:
  1 | f n (let exp = x^2 in exp n) = True
    |      ^^^
  unexpected 'let'
  expecting pattern atom

  test.hs:1:28:
  1 | f n (let exp = x^2 in exp n) = True
    |                            ^
  unexpected )
  expecting end of input