[Lazarus] how to find this error?

[FreeMan]

Thank you,
I remove TStarusBar and codes, I add TPanel and TBCLabel on that panel. 
view been much better status bar. This is good for me, but I didn't find 
error when myform.show; I'm still investigation. I need to trace 
formshow, I wish, compiler give any tips about class or filename or line 
number so easy find problem

On 29.06.2015 13:44, Tony Whyman wrote:
> Take a look at
>
> http://wiki.freepascal.org/Lazarus_known_issues_%28things_that_will_never_be_fixed%29#TStatusBar_Panels_2 
>
>
> It's probably one of those annoying TStatusBar (won't fix) issues.
>
> On 29/06/15 10:43, FreeMan wrote:
>> fpc r31177 lazarus r49465 qt x64 osx
>> my project work in osx qt64, win32 i386 qt is workas well, but in 
>> win64 qt64 create "access violation" exception on "myform.Show;"
>> on form has a "TStatusBar"
>> I := TStatusBar.Canvas.TextWidth(TStatusBar.Panels[0].Text);
>> this code has create exception in win64 too.
>> when I wrote this message, 
>> http://forum.lazarus.freepascal.org/index.php/topic,27706.0.html same 
>> form and same my code worked, I mean my code not changed but not 
>> working now. I remark this line and re try run under win64, but still 
>> raise exception when use myForm.Show;
>> I can not trace this exception, I added onShow event but not trigger. 
>> raise exception and terminate application.
>> whats yours suggestion? TStatusBar bar has a bug ?? or what can be 
>> problem ?
>> Thank you