[redland-dev] Getting comprehensible errors

[Dave Beckett]

On Thu, 7 Jul 2005, Kieron Taylor wrote:
> I am finding the errors I receive from Redland to be very inadequate.
> 
> eg.
> rdf_uri.c:570: (librdf_uri_equals) assertion failed: object pointer of 
> type librdf_uri is NULL.
> rdf_uri.c:570: (librdf_uri_equals) assertion failed: object pointer of 
> type librdf_uri is NULL.
> Redland error: The namespace URI for prefix "ns0" is empty.
> 
> The problem is that I cannot tell which part of the data and my code is 
> making it unhappy. Is there a debug mode that will make this sort of 
> problem easier to deal with?

Use a debugger (say gdb) and set a breakpoint at those files, line numbers 
given in the message and run your program.  Best done with a build with 
CFLAGS including -g.  There should be a function for assertion failures 
that you break on additionally but I haven't added it yet.

Dave