syntax_data: {"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let predicates = tcx.predicates_of(def_id).instantiate_own(tcx, args);
context_before:                     // do not want to try and codegen it, in that case (see #23435).
context_after:                     if impossible_predicates(