AXAPTA first bug

Today I discovered my first bug:

When classDeclaration method like below occurs that error:
public class FormRun extends ObjectRun{
    FormStringControl       lineAccountField;
    FormStringControl       lineAccountField2;
    NumberSeqFormHandler    numberSeqFormHandler;
    SMAAgreementId          agreementId;
}

When write like this, no error:
public class FormRun extends ObjectRun
{
    FormStringControl       lineAccountField;
    NumberSeqFormHandler    numberSeqFormHandler;
    SMAAgreementId          agreementId;
    FormStringControl       lineAccountField2;
}