sigsegv executing ObjectDescription

When I try to get the ObjectDescription of a string constant I get back a NULL even though it's a perfectly valid Objc string. Executing

_NSPrintForDebugger(s) also gives back the right value.

I checked the internal value too it matches what it passes to _NSPrintForDebugger.

This is the log from lldb:

I'm missing something here but I cannot find what. Anyone got suggestions on what I can try?

Carlo Kok schreef op 2/10/2015 om 4:21 PM:

When I try to get the ObjectDescription of a string constant I get back
a NULL even though it's a perfectly valid Objc string. Executing

_NSPrintForDebugger(s) also gives back the right value.

This ended up being me having old copies of system dylibs. Please ignore my question.