Caused by: java.lang.NullPointerException
at org.codehaus.mojo.animal_sniffer.SignatureChecker$CheckingVisitor.visitSource(SignatureChecker.java:268)
at org.codehaus.mojo.animal_sniffer.asm.shaded.ClassReader.accept(Unknown Source)
at org.codehaus.mojo.animal_sniffer.asm.shaded.ClassReader.accept(Unknown Source)
at org.codehaus.mojo.animal_sniffer.SignatureChecker.process(SignatureChecker.java:156)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processClassFile(ClassFileVisitor.java:178)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:103)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
at org.codehaus.mojo.animal_sniffer.ant.CheckSignatureTask.execute(CheckSignatureTask.java:142)