Hi, I am investigating a bug in critics. https://pharo.fogbugz.com/f/cases/22250/RBCascadeNextPutAllsRule-refactoring... I found the source of the problem. In Pharo 6 this critic did a rewrite of the method using RBParseTreeRewriter. This one managed the case where the refactored node was contained in a cascade or not. In Pharo 7 the rewrite is done in ReReplaceNodeCritique. But this one uses a becomeForward: to replace an old node by a rewritten node. But this breaks in case the new node cannot just replace the old one, like when it try to introduce a cascade in another cascade. I don't know renraku enough to fix the problem and I was wondering why ReReplaceNodeCritique does the replacement itself when we already have RBParseTreeNode? -- Cyril Ferlicot https://ferlicot.fr