syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"debug_assert!(!placeholder_trait_ref.has_escaping_bound_vars());"}]}
source_snippet:         debug_assert!(!placeholder_trait_ref.has_escaping_bound_vars());
context_before:     ) -> Result<Option<ty::TraitRef<'tcx>>, ()> {
context_after:         if placeholder_trait_ref.def_id != trait_bound.def_id() {