Problem merging root files

Hi experts,

I am trying to hadd a bunch of small files, but it fails. I have tried several platforms and different versions of root.

This is macOS 10.14.4 with ROOT 6.14/06.

*** Break *** segmentation violation

[/usr/lib/system/libsystem_platform.dylib] _sigtramp (no debug info)

[<unknown binary>] (no debug info)

[/Applications/root_v6.14.06/lib/] TTree::GetEntry(long long, int) (no debug info)

[/Applications/root_v6.14.06/lib/] TTree::CopyEntries(TTree*, long long, char const*) (no debug info)

[/Applications/root_v6.14.06/lib/] TTree::Merge(TCollection*, TFileMergeInfo*) (no debug info)

[/Applications/root_v6.14.06/lib/] TFileMerger::MergeRecursive(TDirectory*, TList*, int) (no debug info)

[/Applications/root_v6.14.06/lib/] TFileMerger::PartialMerge(int) (no debug info)

[/Applications/root_v6.14.06/bin/hadd] main::$_3::operator()(TFileMerger&) const (no debug info)

[/Applications/root_v6.14.06/bin/hadd] main::$_2::operator()(TFileMerger&, int, int) const (no debug info)

[/Applications/root_v6.14.06/bin/hadd] main (no debug info)

[/usr/lib/system/libdyld.dylib] start (no debug info)

[<unknown binary>] (no debug info)

And this is CentOS7 with root 6.14/08.

*** Error in `hadd': double free or corruption (out): 0x000000000460f2d0 ***

======= Backtrace: =========













I am completely lost and any suggestions would be much appreciated!


Hi Vilius,

if you can provide a reproducer, please file a Jira item on our tracker for us to fix.


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