Fix cypclass lock being released before inplace operation

Cython/Compiler/ExprNodes.py

@@ -14190,6 +14190,12 @@ class CoerceToLockedNode(CoercionNode):
     def result(self):
         return self.arg.result()
 
+    def result_in_temp(self):
+        return self.arg.result_in_temp()
+
+    def coerce_to_temp(self):
+        return self
+
     def is_simple(self):
         return False