Issue is reported on Linux ith Intel HD6xx iGPU. Inside
gpu_select_sample_query.c the call to glGetQueryObjectuiv froze. After
bisecting this lead to the polyline shader. When using a 3d color shader
in stead of the polyline shader during selection seems to fix the issue.

Other parts of blender might also be effective, but I wasn't able to
freeze blender in these areas. When it does, we might want to add
a similar work-around to button2d, cage2d, cage3d & move3d, navigate.

Backport this patch to 2.83.