Switching to fully guarded memory allocator.
Blender 2.83 (sub 11)
Build: 2020-04-03 23:01:15 Linux Release
argv[0] = /home/shannon/bin/blender/283/blender
argv[1] = --debug
argv[2] = --factory-startup
argv[3] = Cloth-flag2.blend
read file 
  Version 280 sub 39 date unknown hash unknown
found bundled python: /home/shannon/bin/blender/283/blender-2.83-7c0e28594840-linux64/2.83/python
Read blend: /home/shannon/z/anim/examples/Cloth-flag2.blend
read file /home/shannon/z/anim/examples/Cloth-flag2.blend
  Version 245 sub 17 date unknown hash 
INFO: Converting to Animato...
	converting ob Camera
	converting ob Cylinder
	converting ob Empty
act_to_adt - set adt action to act
ipo to animdata - ID:Empty, IPO:ObIpo.001, actname:<None> constname:<None> seqname:<None>  curves:1
ipo_to_animato
ERROR (bke.lib_id): /home/sources/buildbot-x86_64-slave/linux_glibc217_x86_64_cmake/blender.git/source/blender/blenkernel/intern/lib_id.c:322 id_us_min: ID user decrement error: IPObIpo.001 (from '[Main]'): 0 <= 0
	has anim
	converting ob Lamp
	converting ob Plane
	converting material Material
	converting material Material.001
	converting world World
	converting camera Camera
	converting light Spot
	converting action ObAction
	converting ipo ObIpo.001
INFO: Animato convert done
Writing: /tmp/Cloth-flag2.crash.txt