[Lazarus] TAChart stopped working

[Marc Santhoff]

Replying to myself:

On Mo, 2014-03-03 at 02:41 +0100, Marc Santhoff wrote:
> Hi,
> 
> while running a program using TAChart with a newer version of Lazarus
> (1.0.10 or 1.0.14) and fpc 2.6.2 an exception "ERangeError" is thrown.
> The program dates before Lazarus 1.0.10 and worked flawlessly then.
> 
> The error occurs in line 1103 of TACustomSeries:
> 
> <code>
> procedure TBasicPointSeries.PrepareGraphPoints(
>   const AExtent: TDoubleRect; AFilterByExtent: Boolean);
> ...
>   SetLength(FGraphPoints, FUpBound - FLoBound + 1);
>   if (AxisIndexX < 0) and (AxisIndexY < 0) then
> ...
> </code>
> 
> when SetLength is called.
> 
> I'm using 4 UserDefinedChartSeries for drawing 4 graphs. The
> PointsNumber is 256. When SetLenght is called, in FGraphPoints does have
> approriate contents, FUpBound is 0 and FLoBound is 255.
> 
> Before I document the complete workings of my program I'd like to ask:
> Has there been any change making this one a known issue?

Actually there have been lots of changes since 1.0.10. A new (short)
test using laz 1.2 works flawlessly.

Thanks for the effort, fpc + lazarus is still the best thing one can
get. :)

-- 
Marc Santhoff <M.Santhoff at web.de>