ref: f88d9e728d9db5f396ac1ef2ae09af8212c37f43
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)