var_.SetTypecheck(1)
	var_.MarkNonNil() // mapaccess always returns a non-nil pointer

	n.Lhs[0] = var_
	init.Append(walkExpr(n, init))

	as := ir.NewAssignStmt(base.Pos, a, ir.NewStarExpr(base.Pos, var_))
	return walkExpr(typecheck.Stmt(as), init)
}

// walkAssignRecv walks an OAS2RECV node.
func walkAssignRecv(init *ir.Nodes, n *ir.AssignListStmt) ir.Node {
	init.Append(ir.TakeInit(n)...)

	}
	var e Node = NewUnaryExpr(pos, OIDATA, n)
	e.SetType(types.Types[types.TUINTPTR].PtrTo())
	e.SetTypecheck(1)
	e = NewStarExpr(pos, e)
	e.SetType(types.Types[types.TUINTPTR])
	e.SetTypecheck(1)
	return e
}

// DeclareParams creates Names for all of the parameters in fn's
// signature and adds them to fn.Dcl.
//