[fpc-devel] gdb on amd64

[Peter Vreman]

>> I am investigating a crash of lazarus on the amd64 platfrom.
>>
>> Part of the backtrace looks like this:
>> #18 0x0000000000434ea0 in TAPPLICATION__RUN (this=Cannot access memory
>> at address 0x8000ffffed18
>> ) at application.inc:980
>>
>> Note the parameter of TApplication.Run is not shown, because of the
>> invalid memory address. Is this normal (can't gdb handle this?) or does
>> this indicate a bug in my program?
>
> Sounds like calling a method of an object that isn't properly initialised
> or is corrupted.

It is a 32bit -> 64bit conversion error. gdb converts a signed 32bit to as
an unsigned 32bit to 64bit.