Re: conformsToProtocol over DO

[David Ayers]

Philip Mötteli wrote:
> Hi
>
>
> I have a heavy crash, that I do not understand why:
> I send from a client program the following message:
>
>     [aUser conformsToProtocol:@protocol(UserProtocol)];
>
>
> This makes my server crash in
>
>     #2 in +[NSObject conformsToProtocol:aProtocol] at NSObject.m:1286
>
>
> where the protocol list gives something probably wrong:
>
>     (gdb) print *aProtocol
>     $3 = {isa = 0x4022c680, protocol_name = 0x0, protocol_list = 
> 0c8165c78, instance_methods = 0x0, class_methods = 0x1}
>     (gdb) print *aProtocol->protocol_list
>     $2 = {next = 0x40228580, count = 257, list = {0x0}}

Actually there is more wrong.  The procol name is nil which is illegal 
(and thr strcmp with nil is what is causing the crash) the 
instance_methods list is nil (which could be ok) but the class_methods 
contain an invalid pointer.  It seems that the variable aProtocol is not 
pointing to a valid protocol.

Could you post some more code on how aProtocol is set?

Cheers,
David