superoject: log error message in the 'fmt' field also.

+ Verified error messages are being collected.

Bug: [google internal] b/193711236
Change-Id: I6c608a2af332ccd38722b7f83a82e5ac8fa143db
Reviewed-by: Xin Li <>
Tested-by: Raman Tenneti <>
diff --git a/ b/
index 3613fb0..3b23d29 100644
--- a/
+++ b/
@@ -128,7 +128,7 @@
     """Logs message to stderr and _git_event_log."""
     if self._print_messages:
       print(message, file=sys.stderr)
-    self._git_event_log.ErrorEvent(message, '')
+    self._git_event_log.ErrorEvent(message, f'{message}')
   def _LogError(self, message):
     """Logs error message to stderr and _git_event_log."""