PRB: Non-Standard RETURN TO MASTER Behavior After LOCATE Error

MORE INFORMATION

Steps to Reproduce Behavior

Copy the following two programs, and paste them into appropriately named program (.prg) files:

1. Copy the following into a program named ReturnFail:

      ** Returnfail.prg - demonstrates failure of
      ** RETURN TO MASTER in a class error method
      DEFINE CLASS returntest AS custom
         PROCEDURE init
            CLEAR
            USE HOME()+"samples\data\customer"
            ERROR 12, "MyError"
            *LOCATE FOR CustHeight="Steve" && No such column in table
            =MESSAGEBOX("It didn't return to master")
         ENDPROC
   
         PROCEDURE error
            LPARAMTERS  nError, cMethod, nLine
            =MESSAGEBOX("The error is " + STR(nError,2,0) + ;
                " in " + cMethod +" method.")
            RETURN TO MASTER
         ENDPROC
      ENDDEFINE
   						

2. Copy the following into a program named TryFail:

      ** Tryfail.prg - program to test the failure of
      ** RETURN TO MASTER in a class where the error is
      ** caused by a LOCATE FOR fault.
      CLEAR
      CLOSE ALL
      SET PROCEDURE TO returnfail
      oRef = CREATEOBJECT("returntest")
      =MESSAGEBOX("It did return to master")
   						

3. Run TryFail with the command Do tryfail. Observe that the only message is "It did return to master."
4. Edit the program "ReturnFail" by issuing the following command:

   MODIFY COMMAND returnfail

   Find the following two lines of code:

         ERROR 12, "MyError"
         *LOCATE FOR CustHeight="Steve" && No such column in table
   						

   Remove the asterisk from the second line, and place an asterisk to the left of the first so that the lines look like:

         *ERROR 12, "MyError"
         LOCATE FOR CustHeight="Steve" && No such column in table
   						

   Save that program.
5. Run tryfail again and observe the second and third messages.

An error caused by the ERROR command causes an error, and the error method successfully issues a RETURN TO MASTER command, which successfully returns to the highest level running program.

An error caused by a faulty LOCATE FOR command does not result in a successful RETURN TO MASTER until after first returning to the command immediately following the line that caused the error.