syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"debug!(\"match_impl:"}]}
source_snippet:                 debug!("match_impl: failed eq_trait_refs due to `{}`", e.to_string(self.tcx()))
context_before:             .map_err(|e| {
context_after:             })?;