src/share/classes/sun/tools/tree/AssignOpExpression.java

*** 51,61 ****
  
      /**
       * Select the type
       *
       */
! 
      final void selectType(Environment env, Context ctx, int tm) {
          Type rtype = null;      // special conversion type for RHS
          switch(op) {
              case ASGADD:
                  if (left.type == Type.tString) {
--- 51,61 ----
  
      /**
       * Select the type
       *
       */
!     @SuppressWarnings("fallthrough")
      final void selectType(Environment env, Context ctx, int tm) {
          Type rtype = null;      // special conversion type for RHS
          switch(op) {
              case ASGADD:
                  if (left.type == Type.tString) {