Problems reported:

parser/error_recovery/issue_46346_prime_2:1:6: Expected an identifier, but got ''.
class
     ^...

WARNING: Reporting at eof --- see below for details.

parser/error_recovery/issue_46346_prime_2:1:6: A class declaration must have a body, even if it is empty.
class
     ^...

WARNING: Reporting at eof --- see below for details.

beginCompilationUnit(class)
  beginMetadataStar(class)
  endMetadataStar(0)
  beginClassOrNamedMixinApplicationPrelude(class)
    handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got ''., Try inserting an identifier before ''., {lexeme: }], , )
    // WARNING: Reporting at eof for .
    handleIdentifier(, classOrMixinDeclaration)
    handleNoTypeVariables()
    beginClassDeclaration(class, null, )
      handleNoType()
      handleClassExtends(null, 1)
      handleClassNoWithClause()
      handleClassOrMixinImplements(null, 0)
      handleClassHeader(class, class, null)
      handleNoType()
      handleClassExtends(null, 1)
      handleClassNoWithClause()
      handleClassOrMixinImplements(null, 0)
      handleRecoverClassHeader()
      handleRecoverableError(Message[ExpectedClassOrMixinBody, A class declaration must have a body, even if it is empty., Try adding an empty body., {string: class declaration}], , )
      // WARNING: Reporting at eof for .
      beginClassOrMixinBody(DeclarationKind.Class, {)
      endClassOrMixinBody(DeclarationKind.Class, 0, {, })
    endClassDeclaration(class, })
  endTopLevelDeclaration()
endCompilationUnit(1, )