JuliaArrays / JuliaArrays/ArrayInterface.jl
Bug in `dense_dims` for reshaped views
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- Julia
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Description
Reported in https://github.com/JuliaArrays/ArrayInterface.jl/pull/156#issuecomment-851002133:
julia> using ArrayInterface
julia> u_base = randn(10, 10); u_view = view(u_base, 3, :); u_reshaped_view = reshape(u_view, 1, size(u_base, 2));
julia> ArrayInterface.dense_dims(u_reshaped_view)
As confirmed by @chriselrod in https://github.com/JuliaArrays/ArrayInterface.jl/pull/156#issuecomment-851293134, this is a bug:
The correct answer for
u_reshaped_viewwould be(False(),False()).
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by inspecting the dense_dims implementation and the reshaped-view reproduction described in the issue. Run the Julia example with a view and reshape, then verify that dense_dims returns (False(), False()) for the reshaped view.
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Assessment
- Tech stack
- julia
- Domain
- data
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100