make generator comprehensions work

test/completion/basic.py

@@ -168,6 +168,15 @@ a[0]
 #? int()
 a[0][0]
 
+# -----------------
+# generator comprehensions
+# -----------------
+
+left, right = (i for i in (1, ''))
+
+#? int()
+left
+
 # -----------------
 # ternary operator
 # -----------------