fnptrcalleetfn's N_DOT arm accepted only a bare N_TFN field tnode, so a call through a field declared `cb: *fn(...)` missed, fell through to the name registry, and emitted CALL cb(SB) — an undefined symbol (loud at link; cstage calls the stamped ptr-to-fn indirectly). Same TPTR peel the N_IDENT arm already had. Fixture fnptrfield_call covers the by-value and via-pointer shapes; corpus pin 1478/2956.