MSEide doesn't recognise local variable

[graemeg]

So here is an interesting one.

Call-stack is:
main -> foo() -> bar()

If you set a breakpoint at (1) in the code, SeenByBar is in scope of Bar(). Yes MSEide doesn't believe it is. 🤔 And yet the line right before it, we assigned a value to SeenBaBar, so we know it is in scope.

I'm using Fred's GBD 16 binary. I compiled this program with FPC 3.2.2 under 64-bit Linux using compiler options:
-Mobjfpc -Sh -gl -O- -gw3 -gh -view

I also tried with -gw2, and it made no difference.

Any thoughts?

program testscope;
{$mode objfpc}{$H+}

procedure foo;
var
  SeenByBar: integer;

  procedure Bar;
  begin
    SeenByBar := 1;
    writeln('inside bar 1');     // breakpoint here  (1)
    //NotSeenByBar := 2;
    writeln('inside bar 2');

  end;
var
  NotSeenByBar: integer;

begin
  SeenByBar := 99;
  NotSeenByBar := 99;
  Bar();
end;

var
  sentinal: integer;
begin
  writeln('running testscope');
  Foo();
  sentinal := 1; // breakpoint here
end.

[fredvs]

Did you try with a gdb < ver 10 ?
And trying to debug via terminal (gdb your-app)?

I confess that I dont use breakpoints (or rarely) and dont know yet their features.

[rchastain2]

I confess that I dont use breakpoints (or rarely) and dont know yet their features.

Same for me. I never use the debugger and don't know how to use it. :(

[graemeg]

Wow - how do you guys debug issues then? Granted debugging FPC applications have always been problematic. Delphi and Kylix showed us how things could be. 🎉

It's always been my dream to solve this problem for FPC. It was/is a very interesting topic. Similar to when I was curious how GUI frameworks work, and then built fpGUI Toolkit to find out. 😆

[rchastain2]

Wow - how do you guys debug issues then?

All my applications create log files or write debug out put in to standard/error output. But I would be glad to learn how to use the debugger. This new project of yours could be the occasion. :)

[graemeg]

I used to do the same, and still do in some cases. But using breakpoints, conditional breakpoints, call-stack etc are so convenient. :-D I'll have to make a "Debug FPC programs" video for my YT channel. ;-)