Arrow line not rendering like in AutoCAD 2026

[jsimomaa]

Describe the bug
Arrow line not rendering like in AutoCAD 2026. Please see below screenshots:

ACAD:

ezdxf view:

To Reproduce
ezdxf view "problem line.dxf"

problem line.zip

[eXponenta]

Because this is not line, this is polyline with inconsistent width: 0, 0, 5, 0.
This is not fully supported and width 0 not always will rendered on some backends ( QT on mac skip it at all).

Also has precission degradation when ezdxf compute polygons for polylines.

Got:

Expect:

Source:
line_arrow.dxf.zip