It's problematic: both doing it right and doing it wrong trigger a warning and we treat warnings as errors.
@@ -5,4 +5,8 @@
unmatched_returns
%% underspecs
]}]}.
-{erl_opts, [bin_opt_info, warnings_as_errors, warn_export_all]}.
+{erl_opts, [
+%% bin_opt_info,
+ warnings_as_errors,
+ warn_export_all
+]}.