syntax_data: {"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let placeholder_predicate = self.infcx.enter_forall_and_leak_universe(obligation.predicate);
context_before:     ) -> Result<PredicateObligations<'tcx>, SelectionError<'tcx>> {
context_after:         let self_ty: Ty<'_> = self.infcx.shallow_resolve(placeholder_predicate.self_ty());