syntax_data: {"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let fut_ty = fut_place.ty(&body.local_decls, tcx).ty;
context_before:     let source_info = SourceInfo::outermost(span);
context_after:     let fut_ref_ty = Ty::new_mut_ref(tcx, tcx.lifetimes.re_erased, fut_ty);