./sage -t --warn-long 5.0 --random-seed=233797780117811162927400537850871848271 src/sage/interfaces/polymake.py

sage -t --warn-long 5.0 --random-seed=233797780117811162927400537850871848271 src/sage/interfaces/polymake.py
**********************************************************************
File "src/sage/interfaces/polymake.py", line 450, in sage.interfaces.polymake.PolymakeAbstract.clear
Failed example:
    polymake._available_vars = []
Exception raised:
    Traceback (most recent call last):
      File "/home/zhongcx/sage/src/sage/doctest/forker.py", line 730, in _run
        self.compile_and_execute(example, compiler, test.globs)
        ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/home/zhongcx/sage/src/sage/doctest/forker.py", line 1154, in compile_and_execute
        exec(compiled, globs)
        ~~~~^^^^^^^^^^^^^^^^^
      File "<doctest sage.interfaces.polymake.PolymakeAbstract.clear[1]>", line 1, in <module>
        polymake._available_vars = []
        ^^^^^^^^^^^^^^^^^^^^^^^^
    AttributeError: 'sage.misc.lazy_import.LazyImport' object has no attribute '_available_vars' and no __dict__ for setting new attributes
**********************************************************************
File "src/sage/interfaces/polymake.py", line 453, in sage.interfaces.polymake.PolymakeAbstract.clear
Failed example:
    len(polymake._available_vars)
Expected:
    1
Got:
    2
**********************************************************************
File "src/sage/interfaces/polymake.py", line 455, in sage.interfaces.polymake.PolymakeAbstract.clear
Failed example:
    polymake._next_var_name() in old
Expected:
    True
Got:
    False
**********************************************************************
1 item had failures:
   3 of   7 in sage.interfaces.polymake.PolymakeAbstract.clear
    [257 tests, 3 failures, 2.43s wall]