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When an OSError exception is raised in __del__, both Python 2 and 3 print the "Exception ignored" message, but Python 3 also prints a traceback.
This is similar to issue 22836, with dealt with errors in __repr__ while inside __del__.
Test script:
import os
class Obj(object):
 def __init__(self):
 self.f = open('/dev/null')
 os.close(self.f.fileno())
 def __del__(self):
 self.f.close()
f = Obj()
del f
Output with Python 3.7.2:
Exception ignored in: <function Obj.__del__ at 0x7fb18789be18>
Traceback (most recent call last):
 File "/tmp/test.py", line 9, in __del__
 self.f.close()
OSError: [Errno 9] Bad file descriptor