{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":".downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<GccCodegenBackend>>()"}]}
            .downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<GccCodegenBackend>>()
        ongoing_codegen
            .expect("Expected GccCodegenBackend's OngoingCodegen, found Box<Any>")