From a0b68e573abf15dd77cd9c089e7989fc745f8514 Mon Sep 17 00:00:00 2001
From: Vincenzo Eduardo Padulano <vincenzo.eduardo.padulano@cern.ch>
Date: Tue, 5 May 2026 12:46:15 +0200
Subject: [PATCH] [df] Use same operation order in TTree and DataSource thread
 task

---
 tree/dataframe/src/RLoopManager.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tree/dataframe/src/RLoopManager.cxx b/tree/dataframe/src/RLoopManager.cxx
index ceb9a6a996664..2b6ff0bca37f5 100644
--- a/tree/dataframe/src/RLoopManager.cxx
+++ b/tree/dataframe/src/RLoopManager.cxx
@@ -1333,8 +1333,8 @@ void ROOT::Detail::RDF::RLoopManager::DataSourceThreadTask(const std::pair<ULong
    const auto nEntries = end - start;
    entryCount.fetch_add(nEntries);
 
-   RCallCleanUpTask cleanup(*this, slot);
    RDSRangeRAII _{*this, slot, start};
+   RCallCleanUpTask cleanup(*this, slot);
 
    fSampleInfos[slot] = ROOT::Internal::RDF::CreateSampleInfo(*fDataSource, slot, fSampleMap);