ERROR: Unrecognized attribute string flag '?' in attribute string "T@"NSString",?,R,C" for property debugDescription

Hello,

I'm seeing many errors like this in the Xcode debug console when I build and run my app:

ERROR: Unrecognized attribute string flag '?' in attribute string "T@"NSString",?,R,C" for property debugDescription

The app project makes heavy use of Logger(), and I suspect it is related to that logging in some way, but I haven't been able to narrow down the issue to specific log calls.

I have Category, Subsystem and Timestamp enabled in the Xcode console, but none of those are displayed for this output.

What causes this? Or how can I better narrow down the source?

ERROR: Unrecognized attribute string flag '?' in attribute string "T@"NSString",?,R,C" for property debugDescription
 
 
Q