ref: 037bc7abb3b7b85d38575cdecefdf7936318b1bb
dir: /test/link/section-union/different-size.out/
error: Section "different section sizes" is of type ROM0, which cannot be unionized --- ERROR: <stdin>(16): Cannot declare ROM sections as UNION FATAL: <stdin>(16): Cannot create section "different section sizes" (1 error)