The #257 call-arg fix routes the N_SLICE base through the array-gated cg_dotbase_addr/dotbaseaddr helper. Add the load-bearing deviation guard: a slice of a []T field and of a str field passed straight as a call arg must FALL THROUGH the gate to cgexpr (header .ptr load), not take the field address. Both also exercise the N_DOT esz extension on the fall-through arm (re-slice by element width). cs==ww byte-id.