syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"_"}]}
source_snippet:             _ => span_bug!(self.def_span(impl_def_id), "expected ADT for self type of `Drop` impl"),
context_before:             ty::Adt(def_, args) if def_ == def => args,
context_after:         };