MemoryError when calling (2*pi)^QQ(n) for integers n > 1

[galipnik]

When I call (2*pi)^QQ(n) for some integer n > 1, then I obtain

---------------------------------------------------------------------------
MemoryError                               Traceback (most recent call last)
<ipython-input-4-a458fbffeb47> in <module>()
----> 1 (Integer(2)*pi)**QQ(Integer(2))

../sage-8.9/local/lib/python2.7/site-packages/IPython/core/displayhook.pyc in __call__(self, result)
    248             self.fill_exec_result(result)
    249             if format_dict:
--> 250                 self.write_format_data(format_dict, md_dict)
    251                 self.log_output(format_dict)
    252             self.finish_displayhook()

../sage-8.9/local/lib/python2.7/site-packages/IPython/core/displayhook.pyc in write_format_data(self, format_dict, md_dict)
    187                 result_repr = '\n' + result_repr
    188 
--> 189         print(result_repr)
    190 
    191     def update_user_ns(self, result):

MemoryError: 

Some weird facts:

• It works with non-interal powers, e.g., (2*pi)^(5/2).
• pi^QQ(2) works as well.
• Also expr = (2*pi)^QQ(2) and calculations like expr / expr work fine.

Same issue occurs with sage-9.0.

[gh-DaveWitteMorris]

This can be closed as a duplicate of #30446. The pull request at #30786 adds the appropriate doctest.