syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"LocalDecl::with_source_info(Ty::new_mut_ptr(tcx,"}]}
source_snippet:         LocalDecl::with_source_info(Ty::new_mut_ptr(tcx, coroutine_ty), source_info);
context_before:     body.local_decls[SELF_ARG] =