Forget to ling to the related bug: https://issues.apache.org/jira/browse/GROOVY-8727
cheers, Rémi ----- Mail original ----- > De: "Remi Forax" <fo...@univ-mlv.fr> > À: "dev" <dev@groovy.apache.org> > Envoyé: Dimanche 2 Septembre 2018 18:04:12 > Objet: Support of Java 11 using ASM 6.2.1 and ASM 7 > Hi all, > Java 11 introduces several new forward incompatible features* in the class > file. > > Currently javac only uses one of them, nestmates [1], which allows to declare > that several classes are part of the same nest thus allow access to private > members in between them, obviously changing the semantics of the private > access > for invokevirtual (see [2] if you want more info) if not forward compatible. > > Even if NestMates are declared as class attributes, we have decided in ASM to > not ignore them if there are present in the bytecode (a class compiled with > javac 11) because this change for the VM is far from innocuous, if you scrap > those attributes, you get IllegalAccessError laters, so if you use a > ClassVisitor configured with the ASM6 API and ASM see a nestmate related > attributes (NestHost or NestMembers) it will fail with an > UnsuportedOperationException. > > Moreover, even if the support of Java 11 will came with ASM7, we have decided > to > introduce a new experimental API version (currently ASM7_EXPERIMENTAL) which > let you parse Java 11 using ASM6 (6.2+), so if you want your favorite language > to support Java 11, all visitors need to be upgraded to the api version > ASM7_EXPERIMENTAL. > You can also decide as before to wait until we release ASM7 (the first week > end > after the release of Java as usual, so at the end of September) to use the > ASM7 > api. > > regards, > Rémi > > * see also Constant Dynamic (http://openjdk.java.net/jeps/309) and Preview > Feature (http://openjdk.java.net/jeps/12) > > [1] http://openjdk.java.net/jeps/181 > [2] https://youtu.be/-k_IicifbxQ?list=PLX8CzqL3ArzVnxC6PYxMlngEMv3W1pIkn
