MODULE@0..22
  FN_DECL@0..21
    FUNCTION_KW@0..8 "function"
    WHITESPACE@8..9 " "
    NAME@9..12
      IDENT@9..12 "foo"
    PARAMETER_LIST@12..18
      L_PAREN@12..13 "("
      ERROR@13..17
        TRUE_KW@13..17 "true"
      R_PAREN@17..18 ")"
    WHITESPACE@18..19 " "
    BLOCK_STMT@19..21
      L_CURLY@19..20 "{"
      R_CURLY@20..21 "}"
  WHITESPACE@21..22 "\n"
--
error[SyntaxError]: Expected an identifier or pattern, but found none
  ┌─ formal_params_no_binding_element.js:1:14
  │
1 │ function foo(true) {}
  │              ^^^^

--
function foo(true) {}