// Write closure (arg to newproc/deferproc).
			ACArgs = append(ACArgs, types.Types[types.TUINTPTR]) // not argExtra
			callArgs = append(callArgs, closure)
			stksize += int64(types.PtrSize)
			argStart += int64(types.PtrSize)
			if dextra != nil {
				// Extra token of type any for deferproc
				ACArgs = append(ACArgs, types.Types[types.TINTER])
				callArgs = append(callArgs, dextra)