Re: libobjc2-clang

[David Chisnall]

Hi,

From the back trace, this looks as if it's the v2 ABI.  The assert 
that's firing is here:

https://github.com/gnustep/libobjc2/blob/ed8eec6c6aa82b049fc8292d0c247b8cd6c2fddc/protocol.c#L224

So it's finding an isa pointer for a protocol that is neither the one of 
the known protocol classes and not a known version number.  So the 
question is... what is it?  Can you walk up the stack to that point and see?

David

On 10/06/2020 18:15, Riccardo Mottola wrote:
> Hi,
>
> I am testing a bit libobjc2 + clang on NetBSD/amd64
> As we know, the full libobjc2 testsuite passes and most apps appear to 
> work.
>
> There are some oddities though, like this:
>
> Unknown protocol version[1]   Abort trap (core dumped) Vespucci
>
> as soon as I launch it, it crashes.
>
> Starting program: /Local/Tools/Vespucci
> Unknown protocol version
> Program received signal SIGABRT, Aborted.
> 0x00007a34713678aa in _lwp_kill () from /usr/lib/libc.so.12
> (gdb) bt
> #0  0x00007a34713678aa in _lwp_kill () from /usr/lib/libc.so.12
> #1  0x00007a347136715a in abort () from /usr/lib/libc.so.12
> #2  0x00007a3471c18d56 in init_protocols () from 
> /System/Library/Libraries/libobjc.so.4.6
> #3  0x00007a3471c18b0d in objc_init_protocols ()
>     from /System/Library/Libraries/libobjc.so.4.6
> #4  0x00007a3471c12647 in objc_load_class () from 
> /System/Library/Libraries/libobjc.so.4.6
> #5  0x00007a3471c18235 in __objc_load () from 
> /System/Library/Libraries/libobjc.so.4.6
> #6  0x00007a34725730a4 in ?? () from 
> /System/Library/Libraries/libgnustep-base.so.1.27.0
> #7  0x00007a3472ed9c00 in ?? ()
> #8  0x00007a347256ff69 in _init () from 
> /System/Library/Libraries/libgnustep-base.so.1.27.0
> #9  0x0000000000000000 in ?? ()
>
>
> Ideas?
>
> Riccardo