Steema Central

I just uploaded to Steema upload page an example revealing a bug in
Logarithmic axis mode (file LogAxisBug.zip).

The project includes a precompiled executable. The bug is clearly seen in
debug mode when the project was compiled with range check = on.

The exception raises in the "TeEngine.pas" (version 8.01.10798, September
release), around lines 4578-4579:

if tmpNumTicks>0 then // 7.0 fix first tick
begin
tmpValue:=CalcPosPoint(Tick[tmpNumTicks-1])/LogarithmicBase;
DrawLogMinorTicks(tmpValue);

for t:=-1 to tmpNumTicks-3 do
DrawLogMinorTicks(CalcPosPoint(Tick[t]));

It is obvious, that the index of dynamic array Tick is -1 in this loop!

I am using Delphi 2007 + SP3

Best regards,
Michael

Hi Michael,

Thanks for the information. I've been able to reproduce the issue here and added it (TV52012480) to our defect list to be reviewed for future releases.