Operating system: Linux-5.0.0-15-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: Mesa DRI Intel(R) HD Graphics (Whiskey Lake 3x8 GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 19.0.2
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-09 21:43, hash: rB030c7df19da9
Short description of error
If you import an wavefront .obj file which has no faces defined,
upon import the object will not be shown.
Only after switching to edit mode, and then back to object mode, the imported object will be shown correctly.
Exact steps for others to reproduce the error
import waveform obj file that has no face defined.