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Q44287: Problem Deleting a Line that Is a Breakpoint in QuickC

Article: Q44287
Product(s): See article
Version(s): 2.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | | mspl13_c
Last Modified: 31-MAY-1989

Consider the following sequence of events:

1. You are debugging a program named FILE.C in the QuickC environment.

2. A line is marked as a breakpoint (by pressing F9 or using the
   Debug.Breakpoint dialog box).

3. That line is deleted (by pressing CTRL+Y for example).

4. The program is rebuilt and re-executed (by pressing F5).

   At this point, the following pop-up is displayed:

      Cannot set breakpoint
             file.c:0

To get past this point, you must remove this mysterious breakpoint
through the dialog box selected with the Debug.Breakpoint menu option.
Using this dialog box, remove all breakpoints with a line of zero. The
program may then be executed successfully.

To avoid this problem altogether, do not delete a line that is a
breakpoint. Instead, toggle the breakpoint off by pressing F9 on the
breakpoint prior to deleting that line.

This problem is caused because when a breakpoint line is deleted, the
associated breakpoint entry is not deleted. Rather, its line number is
set to zero. There is no line zero that the debugger can set a
breakpoint on; thus, the error pop-up occurs.

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