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

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- [x] Checked for duplicates ### Describe the bug ``` [ 1675s] [100%] Generating tutorials/hsimple.root [ 1675s] cd /home/abuild/rpmbuild/BUILD/root-6.26.06/_builddir/tutorials && LD_LIBRARY_PATH=/home/abuild/rpmbuild/BUILD/root-6.26.06/_builddir/lib: ROOTIGNOREPREFIX=1 ROOT_HIST=0 /home/abuild/rpmbuild/BUILD/root-6.26.06/_builddir/bin/root.exe -l -q -b -n -x hsimple.C...

bug

- [x] Checked for duplicates ### Describe the bug Root 6.26.04 build fails in a Ubuntu 22.04 `pbuilder` sandbox, with the following features enabled: ``` -- Enabled support for: asimage...

bug

Implemented pythonization to RDF Define. Define can now directly accept a python callable. # This Pull request: ## Changes or fixes: ## Checklist: - [x] tested changes locally - [...

As reported in https://root-forum.cern.ch/t/chi-square-definition-in-root/51083/3, the reported chi-square from `TF1::GetChisquare` and from `FitResult` is not correct. A Neyman chi-square is computed but using also the empty bins. See https://github.com/root-project/root/blob/master/math/mathcore/src/FitResult.cxx#L183 We should...

bug
fixathon

# This Pull request: Makes the code more flake8 compliant ## Changes or fixes: Automatically split the lines and fixed other errors ## Checklist: - [X] tested changes locally -...

- [x] Checked for duplicates ### Describe the bug When trying to build with `--builtin_llvm=OFF --builtin_clang=OFF --builtin_cling=ON`, CMake reports an error ``` [ 52s] -- Enabled support for: builtin_cling builtin_openui5...

bug

In case `builtin_clang=OFF` and/or `builtin_llvm=OFF` is passed to CMake, an awkward warning is generated https://github.com/root-project/root/blob/69002fa23d19ad50ff8dd6c7678a6343748ba3fd/cmake/modules/RootBuildOptions.cmake#L391-L395 The `NOT`s seem to be incorrect.

This is a backport of all the relevant bugfix RooFit PRs that were recently merged to `master` to `v6-26-00-patches` (in the right order, to not have the commit history diverge...

pr:backport
in:RooFit/RooStats

The usual issue to collect what is needed for RooFit in the next 6.26 patch release, this time for 6.26.08. The related issues for the previous 6.26 releases: 1. https://github.com/root-project/root/issues/9508...

in:RooFit/RooStats

# This Pull request: ## Changes or fixes: The actual calculation of the Hessian / covariance matrix done by MnHesse was contained to a single function. Since the only needed...