ref: b02ccf8f4a06d750d1638af30c06a51e0e7c4f06
dir: /test/link/section-union/different-data.out/
error: Section "different data" is of type ROM0, which cannot be unionized
---
error: <stdin>(16):
Cannot declare ROM sections as UNION
FATAL: <stdin>(16):
Cannot create section "different data" (1 error)