SpringEntityLeakDetector throw s NPE

[bananayong]

Environment

Component	Version
Maven	3.6.0
Java	jdk-11.0.2
SpotBugs	3.1.12
FindSecBugs	1.9.0

Problem

I got some problem when run spotbugs with find-sec-bugs plugin.
The issue is that SpringEntityLeakDetector throws NPE when some interface has @RequestMapping annotations.
For feign client I need to put spring MVC annotations on interface.

I think that problem is from MethodGenFactory#analyze.
That method returns null when method.getCode() == null.
So, (MethodGen methodGen = classContext.getMethodGen(m);) methodGen can be null.
NPE is thrown on List<String> classesToInspect = new ArrayList<>(Arrays.asList(methodGen.getReturnType().toString()));

It looks like to solve the issue by skipping when methodGen is null.

Is there any workaround for this problem?
Let me know please.

Thank you!

Code (If needed)

// FeignClient
public interface RemoteClient {
    @RequestMapping(path = "/hello/{name}", method = RequestMethod.GET)
    Hello hello(@PathVariable String name);
}

I made sample project to reproduce this issue.
https://github.com/bananayong/spring-entity-leak-detector-issue

[reitzmichnicht]

I have the same issue, but other usecase. We use the annotated interfaces to separate it from the controller code, so the controller implements the interface with the annotated methods.