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'cumsum' results differ from 'cumsum' on a pure numpy array

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12359 In dask/dask;

· muttener opened on Apr 23, 2026

Understanding why nan_to_num does not accept keyword arguments

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12350 In dask/dask;

· djhoese opened on Apr 8, 2026

pandas nightly is broken (mostly trivial)

dataframe

deprecationSomething is being removedSomething is being removed

good first issueClearly described and easy to accomplish. Good for beginners to the project.Clearly described and easy to accomplish. Good for beginners to the project.

p2Affects more than a few users but doesn't prevent core functionsAffects more than a few users but doesn't prevent core functions

upstream

Status: Open.

#12337 In dask/dask;

· crusaderky opened on Apr 2, 2026

cholesky incorrect for complex dtype

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12335 In dask/dask;

· jcmgray opened on Apr 1, 2026

Performance report breaks alongside python 3.14

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12329 In dask/dask;

· ArielDeVora opened on Mar 17, 2026

da.quantile with weights fails

bugSomething is brokenSomething is broken

Status: Open.

#12322 In dask/dask;

· joshua-gould opened on Mar 11, 2026

Seeking guidance on optimizing large-scale data processing in Python using Dask

discussionDiscussing a topic with no specific actions yetDiscussing a topic with no specific actions yet

needs infoNeeds further information from the userNeeds further information from the user

Status: Open.

#12319 In dask/dask;

· fx0espxor-hue opened on Mar 9, 2026

delayed function applied to an Array duplicates the whole dask graph on creation

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12318 In dask/dask;

· crusaderky opened on Mar 8, 2026

Poorly managed shutdown of distributed and/or sqlite

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12312 In dask/dask;

· crusaderky opened on Mar 4, 2026

Request for improved error handling when using nout in delayed functions

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12295 In dask/dask;

· tmillenaar opened on Feb 18, 2026

Flaky test_collection.py::test_len

testsUnit tests and/or continuous integrationUnit tests and/or continuous integration

Status: Open.

#12275 In dask/dask;

· crusaderky opened on Feb 4, 2026

Zarr writing chunk size warning logic is faulty

needs triageNeeds a response from a contributorNeeds a response from a contributor

Status: Open.

#12263 In dask/dask;

· omdowley opened on Feb 2, 2026