Workaround Jedi Python 3.10 issue

IPython/core/tests/test_completer.py

@@ -26,6 +26,15 b' from IPython.core.completer import ('
     _deduplicate_completions,
 )
 
+if sys.version_info >= (3, 10):
+    import jedi
+    from pkg_resources import parse_version
+
+    # Requires https://github.com/davidhalter/jedi/pull/1795
+    jedi_issue = parse_version(jedi.__version__) <= parse_version("0.18.0")
+else:
+    jedi_issue = False
+
 # -----------------------------------------------------------------------------
 # Test functions
 # -----------------------------------------------------------------------------
@@ -442,6 +451,8 b' class TestCompleter(unittest.TestCase):'
                 matches = c.all_completions("TestCl")
                 assert matches == ['TestClass'], jedi_status
                 matches = c.all_completions("TestClass.")
+                if jedi_status and jedi_issue:
+                    continue
                 assert len(matches) > 2, jedi_status
                 matches = c.all_completions("TestClass.a")
                 assert matches == ['TestClass.a', 'TestClass.a1'], jedi_status
@@ -496,6 +507,7 b' class TestCompleter(unittest.TestCase):'
             "encoding" in c.signature
         ), "Signature of function was not found by completer"
 
+    @pytest.mark.xfail(jedi_issue, reason="Known failure on jedi<=0.18.0")
     def test_deduplicate_completions(self):
         """
         Test that completions are correctly deduplicated (even if ranges are not the same)