ref: bde380f38b1d2a57d7d9aa35b7210a47085f41a7
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)