syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // avoid erroneous `Drop` impls from causing ICEs below
context_before:         && tcx.is_lang_item(trait_ref.instantiate_identity().def_id, LangItem::Drop)
context_after:         && let sig = tcx.fn_sig(def_id).instantiate_identity()