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[RDF] prevent memleaks #21990

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ferdymercury wants to merge 5 commits into from
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[RDF] prevent memleaks #21990

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8c1dbec
[RDF] prevent memleaks
ferdymercury Apr 21, 2026
0524064
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ferdymercury Apr 21, 2026
2f0bc24
clangf
ferdymercury Apr 21, 2026
a72bfbf
[df] another occurrence
ferdymercury Apr 21, 2026
7003f23
[io] fix memleak
ferdymercury Apr 21, 2026
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5 changes: 4 additions & 1 deletion tree/dataframe/src/RDFSnapshotHelpers.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -260,7 +260,8 @@ void EnsureValidSnapshotRNTupleOutput(const ROOT::RDF::RSnapshotOptions &opts, c
if (!outFile || outFile->IsZombie())
throw std::invalid_argument("Snapshot: cannot open file \"" + fileName + "\" in update mode");

auto *outNTuple = outFile->Get<ROOT::RNTuple>(ntupleName.c_str());
std::unique_ptr<ROOT::RNTuple> uoNT { outFile->Get<ROOT::RNTuple>(ntupleName.c_str()) };
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auto *outNTuple = uoNT.get();

if (outNTuple) {
if (opts.fOverwriteIfExists) {
Expand Down Expand Up @@ -937,6 +938,8 @@ void ROOT::Internal::RDF::UntypedSnapshotRNTupleHelper::Initialize()
writeOptions.SetEnablePageChecksums(fOptions.fEnablePageChecksums);
writeOptions.SetEnableSamePageMerging(fOptions.fEnableSamePageMerging);

// Delete beforehand (.reset does it in inverse order, creates new and then deletes)
delete fOutputFile.release();
fOutputFile.reset(TFile::Open(fFileName.c_str(), fOptions.fMode.c_str()));
if (!fOutputFile)
throw std::runtime_error("Snapshot: could not create output file " + fFileName);
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