syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"assert!(!candidate.subcandidates.is_empty());"}]}
source_snippet:         assert!(!candidate.subcandidates.is_empty());
context_before:     fn merge_trivial_subcandidates(&mut self, candidate: &mut Candidate<'tcx>) {
context_after:         if candidate.has_guard {