Xcode 11调试器的怪异行为-有值时将值显示为nil

我刚刚注意到Xcode11的怪异行为，我正在Xcode 10和Xcode 11中执行相同的代码.

I just noticed weird behaviour of Xcode11, I am executing same code in Xcode 10 and Xcode 11.

有关两个版本，请参见下面的屏幕快照.

See the below attached screenshot for both the versions.

我正在从String创建一个url，当我放入调试器并检查myUrl的值时，它显示为nil，尽管在下一行它通过nil，并且控制进入not nil情况.

I am creating a url from String, When I put a debugger and check the value of myUrl it shows nil although at very next line it passes nil check and control goes into the not nil case.

也请参阅控制台.

有人遇到过此类问题吗?或我做错了什么.

have anyone already faced this type of issue? or I am doing something wrong.

P.S:已清除缓存，派生数据，清理构建，重新启动Xcode.不要与断点的位置混淆，它们都是用不同的系统捕获的.

P.S: Already Cleared cache, derived data, clean build, restart Xcode. don't confuse with the breakpoint's location, both are captured with different system.

谢谢.