Fix an issue with type vars that might have been a problem for other things as well

jedi/evaluate/compiled/mixed.py

@@ -266,7 +266,11 @@ def _create(evaluator, access_handle, parent_context, *args):
             if name is not None:
                 evaluator.module_cache.add(string_names, ContextSet([module_context]))
         else:
-            assert parent_context.tree_node.get_root_node() == module_node
+            if parent_context.tree_node.get_root_node() != module_node:
+                # This happens e.g. when __module__ is wrong, or when using
+                # TypeVar('foo'), where Jedi uses 'foo' as the name and
+                # Python's TypeVar('foo').__module__ will be typing.
+                return ContextSet({compiled_object})
             module_context = parent_context.get_root_context()
 
         tree_contexts = ContextSet({

test/test_api/test_interpreter.py

@@ -473,3 +473,12 @@ def test_partial_signatures(code, expected, index):
     assert sig.name == 'partial'
     assert [p.name for p in sig.params] == expected
     assert index == sig.index
+
+
+@pytest.mark.skipif(sys.version_info[0] == 2, reason="Ignore Python 2, because EOL")
+def test_type_var():
+    """This was an issue before, see Github #1369"""
+    import typing
+    x = typing.TypeVar('myvar')
+    def_, = jedi.Interpreter('x', [locals()]).goto_definitions()
+    assert def_.name == 'TypeVar'