Problems reported:

parser/error_recovery/issue_42229_prime_5:1:1: Variables must be declared using the keywords 'const', 'final', 'var' or a type name.
hello
^^^^^

parser/error_recovery/issue_42229_prime_5:1:1: Expected ';' after this.
hello
^^^^^

beginCompilationUnit(hello)
  beginMetadataStar(hello)
  endMetadataStar(0)
  beginTopLevelMember(hello)
    beginFields(DeclarationKind.TopLevel, null, null, null, null, null, null, )
      handleRecoverableError(MissingConstFinalVarOrType, hello, hello)
      handleNoType()
      handleIdentifier(hello, topLevelVariableDeclaration)
      handleNoFieldInitializer()
      handleRecoverableError(Message[ExpectedAfterButGot, Expected ';' after this., null, {string: ;}], hello, hello)
    endTopLevelFields(null, null, null, null, null, 1, hello, ;)
  endTopLevelDeclaration()
endCompilationUnit(1, )