Am 30.10.2014 11:01 schrieb "[email protected]" <[email protected]>: > > I managed to acquire some additional information on Lazarus 1.3 + FPC ARC edition problem > > First of all, I tested if Lazarus 1.3 trunk compiled with FPC trunk works correctly. It does. > > However, Lazarus 1.3 trunk with FPC ARC crashes. > > Lazarus trunk by FreePascal trunk -> OK > Lazarus trunk by FreePascal ARC edition -> CRASH at startup > > here is the point where it crashes: > > D:\FPC_ARC\L>lazarus.exe > using config file D:\FPC_ARC\L\lazarus.cfg > [FORMS.PP] ExceptionOccurred > Sender=Exception > Exception=GetVMTVirtualMethodOffset Parent Virtual Method not found > Stack trace: > $00710C16 GETVMTVIRTUALMETHODOFFSET, line 458 of D:/FPC_ARC/L/designer/jitforms.pp > $00710D21 GETTCOMPONENTVALIDATERENAMEVMTOFFSET, line 497 of D:/FPC_ARC/L/designer/jitforms.pp > $00714F18 JITFORMS_$$_init, line 2094 of D:/FPC_ARC/L/designer/jitforms.pp > $00410F54 > TApplication.HandleException GetVMTVirtualMethodOffset Parent Virtual Method not found > Stack trace: > $00710C16 GETVMTVIRTUALMETHODOFFSET, line 458 of D:/FPC_ARC/L/designer/jitforms.pp > $00710D21 GETTCOMPONENTVALIDATERENAMEVMTOFFSET, line 497 of D:/FPC_ARC/L/designer/jitforms.pp > $00714F18 JITFORMS_$$_init, line 2094 of D:/FPC_ARC/L/designer/jitforms.pp > $00410F54 > Exception at 00710C16: Exception: > GetVMTVirtualMethodOffset Parent Virtual Method not found. > > Even if line numbers are slightly different, you can easily find the place where exception is raised: in jitforms.pp: in procedure GetVMTVirtualMethodOffset: raise Exception.Create('GetVMTVirtualMethodOffset Parent Virtual Method not found'); > > I leave the decision if this worth investigating or not to you as I am myself not sure. Not that I could possibly force someone to look into it even if I insisted.
The VMT has changed in my branch. Take a look at the declaration of TVmt in rtl/inc/objpash.inc and maybe adjust the code to use the offset of the first virtual method instead of hardcoding it... Regards, Sven
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