An out-of-spec classfile can cause a ClassCastException, as when verbose output is requested from the javap tool:

$ javap -v CCE_javap_minus_v.class
....

Please file a bug report, and include the following information:
java.lang.ClassCastException: class jdk.internal.classfile.impl.AbstractPoolEntry$DoubleEntryImpl cannot be cast to class jdk.internal.classfile.impl.AbstractPoolEntry$Utf8EntryImpl (jdk.internal.classfile.impl.AbstractPoolEntry$DoubleEntryImpl and jdk.internal.classfile.impl.AbstractPoolEntry$Utf8EntryImpl are in module java.base of loader 'bootstrap')
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.utf8EntryByIndex(ClassReaderImpl.java:364)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readUtf8Entry(ClassReaderImpl.java:407)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.entryByIndex(ClassReaderImpl.java:332)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readEntry(ClassReaderImpl.java:385)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readEntry(ClassReaderImpl.java:390)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readNameAndTypeEntry(ClassReaderImpl.java:436)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.entryByIndex(ClassReaderImpl.java:328)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readEntry(ClassReaderImpl.java:385)
at java.base/jdk.internal.classfile.impl.ClassReaderImpl.readEntry(ClassReaderImpl.java:390)
at java.base/jdk.internal.classfile.impl.AbstractInstruction$BoundInvokeInstruction.method(AbstractInstruction.java:416)

....