Fix await issues. At the moment Jedi is just ignoring await statements.

jedi/evaluate/__init__.py

@@ -280,7 +280,9 @@ class Evaluator(object):
         elif element.type == 'expr_stmt':
             types = self.eval_statement(context, element)
         elif element.type in ('power', 'atom_expr'):
-            types = self._eval_atom(context, element.children[0])
+            first_child = element.children[0]
+            if not (first_child.type == 'keyword' and first_child.value == 'await'):
+                types = self._eval_atom(context, first_child)
                 for trailer in element.children[1:]:
                     if trailer == '**':  # has a power operation.
                         right = self.eval_element(context, element.children[2])

test/completion/async_.py

@@ -0,0 +1,19 @@
+"""
+Tests for all async use cases.
+
+Currently we're not supporting completion of them, but they should at least not
+raise errors or return strange results.
+"""
+
+
+async def x():
+    await 3
+
+#?
+x()
+
+a = await x()
+#?
+a
+
+