# Blender 2.80 (sub 75), Commit date: 2019-07-23 13:52, Hash b63f0266a056
bpy.data.window_managers["WinMan"].(null) = False  # Property

# backtrace
./blender(BLI_system_backtrace+0x1d) [0x1369f1d]
./blender() [0x1153319]
/lib64/libc.so.6(+0x3be50) [0x7ff03c263e50]
./blender(normal_quad_v3+0x11) [0x133b251]
./blender() [0x136b22f]
./blender() [0x136a2e0]
/lib64/libpthread.so.0(+0x8faa) [0x7ff03c620faa]
/lib64/libc.so.6(clone+0x3f) [0x7ff03c32573f]