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The official repository for ROOT: analyzing, storing and visualizing big data, scientifically

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### Explain what you would like to see improved By default, `hadd/TFileMerger` will open the maximum number of allowed opened files. https://github.com/root-project/root/blob/3dd47b9da2519f0e98762a8f0be43971b5ed8f5b/io/io/src/TFileMerger.cxx#L61-L93 This seems too large as a default, and...

improvement
in:I/O

## This Pull request: Fuse Conv or ConvTranpose and Add operators.

### Describe the bug When adding two histograms, the weights associated with the bin contents of those histograms should also be added appropriately. `THnSparse` does not do this. It still...

bug
in:Math Libraries
affects:6.24

- [x] Checked for duplicates ### Describe the bug It seems that in pyROOT, the NLL variable created from `RooAbsPdf.createNLL` does not get disposed of properly when the variable went...

bug
in:RooFit/RooStats

## Changes or fixes: Implement startup script support according to this post: https://root-forum.cern.ch/t/cling-startup-scripts-support/51358 ## Checklist: - [X] tested changes locally - [ ] updated the docs (if necessary)

### Describe the bug Apparently calling `Display` with some extra parameter like `nRows` is not respected if before calling `Print` one adds any other operation to the graph. ### To...

bug
in:RDataFrame

### Describe the bug Doing: ```C++ #include #include #include #include void bar() { auto f = TFile::Open("/Users/ktf/Downloads/AO2D-2.root"); char const *dfs[1] = {"DF_2449800039997798139;1"}; for (auto di = 0; di < 1;...

bug
priority:high
in:I/O
affects:6.24
affects:6.26
experiment
affects:6.28
affects:6.30
affects:6.32

### Explain what you would like to see improved root uses pcre (8.45), while upstream no longer maintains or supports it. Fedora is in the process of actively removing pcre...

improvement