public java.lang.String toString ( ) { <BUG> return ( ( ( STRING_1 + ( this . VAR_1 ) ) + STRING_2 ) + STRING_3 ) + ( this . VAR_2 ) ;</BUG> }
public java.lang.String toString ( ) { return ( ( ( STRING_1 + ( this . VAR_1 . toString ( ) ) ) + STRING_2 ) + STRING_3 ) + ( this . VAR_2 . toString ( ) ) ; } 
