FULL PRODUCT VERSION :
java version "1.8.0_72"
Java(TM) SE Runtime Environment (build 1.8.0_72-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.72-b15, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
All OS
tested on mac, windows, debian

A DESCRIPTION OF THE PROBLEM :
Lets try to compile provided java code. Code is uncompilable, A annotations should be wrapped by an array array. But javac process crashes with nullpointer and do not show proper error message.

I have found same bug - JDK-8145377. Maintainer has closed it as "could not reproduce". I am not jdk member, so I do not have and account to reopen it. I provide you reproduce steps. So please reopen it (or you can simplify your process to obtain jira account, so I can do it myself ;))

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) try to compile provided java class
-> compilation ends up with nullpointer

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
javac fails to compile but without nullpointer and shows proper error message
ACTUAL -
javac crash

ERROR MESSAGES/STACK TRACES THAT OCCUR :
 com.sun.tools.javac.comp.Check$1AnnotationValidator.visitAnnotation(Check.java:2658)
at com.sun.tools.javac.tree.JCTree$JCAnnotation.accept(JCTree.java:2317)
at com.sun.tools.javac.comp.Check.validateAnnotationTree(Check.java:2663)
at com.sun.tools.javac.comp.Check.validateAnnotation(Check.java:2730)
at com.sun.tools.javac.comp.Check.validateAnnotations(Check.java:2717)
at com.sun.tools.javac.comp.MemberEnter$6.run(MemberEnter.java:891)
at com.sun.tools.javac.comp.Annotate.flush(Annotate.java:155)
at com.sun.tools.javac.comp.Annotate.enterDone(Annotate.java:129)
at com.sun.tools.javac.comp.Enter.complete(Enter.java:512)
at com.sun.tools.javac.comp.Enter.main(Enter.java:471)
at com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:982)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:857)
at com.sun.tools.javac.main.Main.compile(Main.java:523)
at com.sun.tools.javac.main.Main.compile(Main.java:381)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:361)
at com.sun.tools.javac.Main.compile(Main.java:74)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
@B(
    @A,
    @A
)
public class Null4JDK {

}

@interface B {
    public abstract A[] endpoints() default {};
}

@interface A {

}

---------- END SOURCE ----------