syntax_data: {"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let ParamEnvAnd { param_env, value: ImpliedOutlivesBounds { ty } } = key;
context_before:     tcx.infer_ctxt().enter_canonical_trait_query(&goal, |ocx, key| {
context_after:         compute_implied_outlives_bounds_inner(