use rustc_middle::traits::query::OutlivesBound;
use rustc_middle::ty;
-#[instrument(level = "debug", skip(param_env))]
+#[instrument(level = "debug", skip(param_env), ret)]
pub fn explicit_outlives_bounds<'tcx>(
param_env: ty::ParamEnv<'tcx>,
) -> impl Iterator<Item = OutlivesBound<'tcx>> + 'tcx {