Once the fix for 'method deleted' failures on retransformation is promoted (it has already been putback) remove this workaround in the IsModifiableClass test:

                    } catch (UnsupportedOperationException e) {
                        // Remove this before FCS
                        System.err.println("Warning: working around 'method deleted' bug: " + klass);
                        System.err.println(" exception: " + e);