ctfconvert: rc = 1 Unsupported version [_dwarf_info_load(229)]

I've just finished builds of yesterday's CURRENT / main for arm and arm64.
In both builds I got lots of messages from ctfconvert:
   ctfconvert: rc = 1 Unsupported version [_dwarf_info_load(229)]

I got an impression that there was a message for each object file, that's how 
many of them were there.

I don't recall seeing those messages before.

Should I be concerned?
Maybe I am doing something wrong or have an unusual configuration?
Any way to fix the issue?

Thanks!

P.S.
The builds were done on stable/13, so maybe there is an issue with host tools 
not being able to grok something new.

-- 
Andriy Gapon