[ML] Fix compilation issue in debug build (#2815)

edsavage · web-flow · commit 1ea823153e7e · 2025-01-17T09:25:56.000+13:00
Fix a TRACE statement which causes the debug build compilation to fail
diff --git a/lib/maths/time_series/unittest/CTimeSeriesMultibucketFeaturesTest.cc b/lib/maths/time_series/unittest/CTimeSeriesMultibucketFeaturesTest.cc
@@ -382,7 +382,7 @@ BOOST_AUTO_TEST_CASE(testMultivariateMean) {
         std::ostringstream json;
         ml::core::CJsonStatePersistInserter inserter{json};
         feature.acceptPersistInserter(inserter);
-        LOG_TRACE(<< i << ") model JSON representation:\n" << json);
+        LOG_TRACE(<< i << ") model JSON representation:\n" << json.str());
         LOG_DEBUG(<< i << ") model JSON size: " << json.str().size());
 
         // Restore the JSON into a new feature and assert checksums.
