syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"ty::CoroutineWitness(..)"}]}
source_snippet:             ty::CoroutineWitness(..) => bug!("symbol_names: unexpected `CoroutineWitness`"),
context_before:             ty::Alias(..) => bug!("symbol_names: unexpected alias"),
context_after:         }