Val in Java – Lombok generates an “incompatible type” error in IntelliJ, but it still compiles well

I found this Code:

Class<? extends Enum> enumClass = Class.forName(Charsets.class.getName())
                                       .asSubclass(Enum.class);

I wanted to refactor it with Lombok, but something unexpected happened When I change it to:

val enumClass = Class.forName(Charsets.class.getName())
                     .asSubclass(Enum.class);

I received this error:

Surprisingly, the code compiled well and the tests using it passed

I'm not sure if it's a Lombok plug-in, an error in the IDE, or what I did wrong Shouldn't Longmu island be able to easily infer the correct type of variable?

My question is: can I use the code safely or should I restore the original code?

I'm using the latest (at this time) inteliij:

Solution

Confirm to use IntelliJ idea 2018.1 1 and Lombok plug-in 0.17-2018.1