{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"//"}]}
                        // due to MCP#807, this is debug info where it's fine.
                        // While we can't project into `NonNull<_>` in a basic block
                        new_projections.push(PlaceElem::Field(FieldIdx::ZERO, ptr_ty));