test for yields in expressions.

test/completion/generators.py

@@ -179,6 +179,16 @@ gen().send()
 #? 
 gen()()
 
+# -----------------
+# yield in expression
+# -----------------
+
+def x():
+     a= [(yield 1)]
+
+#? int()
+next(x())
+
 # -----------------
 # yield from
 # -----------------