syntax_data: {"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:         {
context_before:             fast_reject::simplify_type(tcx, trait_ref.self_ty(), TreatParams::InstantiateWithInfer)
context_after:             debug!("insert_blindly: impl_def_id={:?} st={:?}", impl_def_id, st);