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[ROOT-4550] TMessage doesn't honour kIsOwner bit when compression is used

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### Check duplicate issues. - [ ] Checked for duplicates ### Description From https://its.cern.ch/jira/browse/ROOT-4550 For TBuffer, one can set kIsOwner to false to ensure it doesn't delete the buffer passed...

vepadulano

Usability of TExecutor::MapReduce

2

### Explain what you would like to see improved It's hard to use TExecutor::MapReduce correctly, because the required signature of the reducer isn't mentioned in the documentation. ### Optional: share...

hageboeck

Add a Tutorial for IntegratorMultiDim

3

### Explain what you would like to see improved There is a class for multidimensional integration, [IntegratorMultiDim](https://root.cern/doc/master/classROOT_1_1Math_1_1IntegratorMultiDim.html). From that it's very hard to understand how to use that (in particular,...

ynikitenko

[DF] RDF using TTree with non standard branch name ("branchName.") fails

2

### Check duplicate issues. - [ ] Checked for duplicates ### Description If RDF is created from the TTree which has a branch that has a non standard name, such...

martamaja10

[ROOT-5157] Enhance Documentation for I/O customization rules

1

### Explain what you would like to see improved and how. From https://its.cern.ch/jira/browse/ROOT-5157 Chapter on schema evolution support needs to be added to the Users' Guide. For example bases in...

vepadulano

[DF] `AsNumpy` should automatically convert RVecs into numpy arrays

3

### Explain what you would like to see improved `df.AsNumpy(["vector_branch"])` produces a numpy array of `RVec` objects. Given that converting `RVec`s into numpy arrays is a zero-copy operation via `np.asarray`,...

eguiraud

Support a blocked range in TExecutor?

1

### Is your feature request related to a problem? Please describe. Not a problem, just ease of use when processing e.g. a large array with a lot of entries in...

hageboeck

[ntuple] Bad state after attempting to make field for virtual type

2

### Check duplicate issues. - [X] Checked for duplicates ### Description If a code attempts to create a field in an RNTuple for a virtual object type, it rightfully fails,...

nsmith-

[ntuple] Consider making `REntry::AddValue()` publicly accessible

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As per a request from @Nowakus, making `REntry::AddValue()` publicly accessible would be useful in some specific cases. @Nowakus could you please comment in this issue why (I cannot recall now)....

jalopezg-git

### Check duplicate issues. - [x] Checked for duplicates ### Description ROOT misbehaves when ASAN is enabled. Below different incarnation of the problem are illustrated: - [ ] root/io/bigevent, root/io/event,...

dpiparo