The README-builds.html is missing a crucial versioning requirement on the bootstrap JDK. It says the bootstrap JDK must be "a previously released" version of the JDK, which must be 7u7 "or newer". This could be construed to mean that an earlier build of JDK8 could be used to build JDK8. This is in fact not allowed. The general rule is that the boot JDK used for building JDK N must be an instance of JDK N-1. That is, the boot JDK must be an instance of the *previous major release* of the JDK.

The README-builds.html file should be much more explicit about this.