add debug log

Author: ehellbar

Framework/Core/src/DataProcessingHelpers.cxx

@@ -74,15 +74,16 @@ void doSendOldestPossibleTimeframe(ServiceRegistryRef ref, fair::mq::TransportFa
   dih.oldestPossibleTimeslice = timeslice;
   auto channelAlloc = o2::pmr::getTransportAllocator(transport);
   auto header = o2::pmr::getMessage(o2::header::Stack{channelAlloc, dih});
+  {
+    auto* hb = header ? reinterpret_cast<const uint32_t*>(header->GetData()) : nullptr;
+    LOGP(error, "SENDOPT idx={} ts={} firstWord={:#010x} hdrSize={}",
+         index.value, timeslice, hb ? *hb : 0u, header ? header->GetSize() : 0u);
+  }
   // sigh... See if we can avoid having it const by not
   // exposing it to the user in the first place.
   parts.AddPart(std::move(header));
   parts.AddPart(std::move(payload));
 
-  auto* hb = reinterpret_cast<const uint32_t*>(header->GetData());
-  LOGP(error, "SENDOPT idx={} ts={} firstWord={:#010x} hdrSize={}",
-       index.value, timeslice, hb ? *hb : 0u, header->GetSize());
-
   callback(parts, index, ref);
 }