Teach test_server to report severe errors to common_test

If a severe error occurs in test_server (e.g. failing to write to
log files), test_server would terminate without commont_test knowing
about it. Since ct_run can now return an exit code, it is important
that common_test is aware of severe problem so that it can indicate
that an error has occurred.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/common_test/src/ct_run.erl b/lib/common_test/src/ct_run.erl
index 3383244bf4..4a6a3cdcac 100644
--- a/lib/common_test/src/ct_run.erl
+++ b/lib/common_test/src/ct_run.erl
@@ -2192,6 +2192,15 @@ do_run_test(Tests, Skip, Opts) ->
 			  end, CleanUp),
 	    [code:del_path(Dir) || Dir <- AddedToPath],
 
+	    %% If a severe error has occurred in the test_server,
+	    %% we will generate an exception here.
+	    case ct_util:get_testdata(severe_error) of
+		undefined -> ok;
+		SevereError ->
+		    ct_logs:log("SEVERE ERROR", "~p\n", [SevereError]),
+		    exit(SevereError)
+	    end,
+
 	    case ct_util:get_testdata(stats) of
 		Stats = {_Ok,_Failed,{_UserSkipped,_AutoSkipped}} ->
 		    Stats;