Crash in AnnotatedTypes.annotatedGLB: intersection bounds

[cushon]

This reproduces at head with #4866 and #4875 patched in:

interface N<T extends N<T>> {}

interface O<T extends N<T>> {}

interface X {}

class Q<M extends N<M> & X> {}

final class P<T extends N<T>> implements O<T> {
  Q<? extends T> f;
}

$ ./checker/bin/javac -processor Nullness X.java
error: Neither N<capture#241 extends T extends N<T extends N<T>> & X> & X nor T extends N<T> is one of the intersection bounds in N. Bound: T & N & X
  ; The Checker Framework crashed.  Please report the crash.
  Compilation unit: X.java
  Last visited tree at line 10 column 3:
    Q<? extends T> f;
  Exception: java.lang.Throwable; java.lang.Throwable
        at org.checkerframework.javacutil.BugInCF.<init>(BugInCF.java:34)
        at org.checkerframework.framework.util.AnnotatedTypes.annotatedGLB(AnnotatedTypes.java:838)
        at org.checkerframework.framework.type.AnnotatedTypeFactory.annotateCapturedTypeVar(AnnotatedTypeFactory.java:5063)
        at org.checkerframework.framework.type.AnnotatedTypeFactory.applyCaptureConversion(AnnotatedTypeFactory.java:4883)
        at org.checkerframework.framework.type.AnnotatedTypeFactory.applyCaptureConversion(AnnotatedTypeFactory.java:4774)
        at org.checkerframework.common.basetype.BaseTypeValidator.visitParameterizedType(BaseTypeValidator.java:549)
        at org.checkerframework.common.basetype.BaseTypeValidator.visitDeclared(BaseTypeValidator.java:334)
        at org.checkerframework.common.basetype.BaseTypeValidator.visitDeclared(BaseTypeValidator.java:57)
        at org.checkerframework.framework.type.AnnotatedTypeMirror$AnnotatedDeclaredType.accept(AnnotatedTypeMirror.java:955)
        at org.checkerframework.framework.type.visitor.AnnotatedTypeScanner.scan(AnnotatedTypeScanner.java:206)
        at org.checkerframework.framework.type.visitor.AnnotatedTypeScanner.visit(AnnotatedTypeScanner.j