This change enforces the unqualified name format checks for `NameAndType` strings as outlined in the JVM specification sections 4.4.6 and 4.2.2, meaning that some illegal names and descriptors that users may be utilizing in their classfiles will now be caught with a Class Format Error. This includes format checking for all strings under non-referenced `NameAndType`'s. Users will see a change if they
(A) are using Java classfile version 6 or below and have an illegal NameAndType descriptor with no Methodref or Fieldref reference to it; or
(B) are using any Java classfile version and have an illegal NameAndType name with no Methodref or Fieldref reference to it.

In both (A) and (B) the users will now receive a ClassFormatError for those illegal strings, which is an enforcement of unqualified name formats as delineated in JVMS 4.2.2.