I am trying to use TextClause in with_expression and getting error. 
Simplest example:

from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base
  
Base = declarative_base()
  
  
class A(Base): 
    __tablename__ = 'a'
    id = Column(Integer, primary_key=True)
    x = Column(String)
    expr = query_expression()
   
s = Session()
s.query(A).options(with_expression(A.expr, text('x'))) 


And result is:

AttributeError: 'TextClause' object has no attribute 'label'

Am I doing something wrong? What can I do to make it work?

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