syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // we were to winnow, we'd wind up with zero candidates.
context_before:         // is a `Vec<Bar>` and `Bar` does not implement `Clone`. If
context_after:         // Instead, we select the right impl now but report "`Bar` does