Disable the star import cache.

test/completion/imports.py

@@ -121,6 +121,14 @@ def test_import_priorities():
     from import_tree import the_pkg, invisible_pkg
     #? int()
     invisible_pkg
+    # In real Python, this would be the module, but it's not, because Jedi
+    # doesn't care about most stateful issues such as __dict__, which it would
+    # need to, to do this in a correct way.
+    #? int()
+    the_pkg
+    # Importing foo is still possible, even though inivisible_pkg got changed.
+    #? float()
+    from import_tree.invisible_pkg import foo
 
 
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