ref: c4361b965c965a1274fc43286c30c8769e8ebdd4 dir: /test/asm/reference-undefined-sym.asm/
SECTION "sec", ROM0[0] db x1, x2, y1, y2 def x1 = 1 redef x2 = 2 def y1 equ 3 redef y2 equ 4