Wow, seeing a buffer overflow here Can't cut circle - it cuts a squigly squashed star instead - #18 by Gero, but in your case it seems to be cause by something else. 
The line Buffer Contents has strange /n in it…
Can you share the .nc?
Wow, seeing a buffer overflow here Can't cut circle - it cuts a squigly squashed star instead - #18 by Gero, but in your case it seems to be cause by something else.
The line Buffer Contents has strange /n in it…
Can you share the .nc?