ref: 3c5e1caa7c29d1a559d1144d3d00d9d981a7ac9a
dir: /test/link/section-union/data-overlay.out/
error: Section "overlaid data" is of type ROM0, which cannot be unionized
---
ERROR: <stdin>(18):
Cannot declare ROM sections as UNION
FATAL: <stdin>(18):
Cannot create section "overlaid data" (1 error)