ref: 1e3ce2a36f651641b9158a476dd65ebda0978b83
dir: /test/asm/section-union.err/
ERROR: section-union.asm(37): Section "test" already declared as union ERROR: section-union.asm(37): Section "test" already declared as fixed at $c000 ERROR: section-union.asm(37): Section "test" already declared as aligned to 256 bytes ERROR: section-union.asm(37): Cannot create section "test" (3 errors)