syntax_data: {"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let obligation = obligation.with(self.tcx(), t);
context_before:                     debug_assert!(!t.has_escaping_bound_vars());
context_after:                     self.evaluate_trait_predicate_recursively(previous_stack, obligation)