JuliaDiff/ChainRules.jl

View on GitHub

forward and reverse mode automatic differentiation primitives for Julia Base + StdLibs

Stars: 475
Forks: 98
Open beginner issues: 0
Indexed issues: 96

Dominant language: Julia
License: No license data
Last GitHub push: Mar 10, 2026
Latest indexed: Sep 18, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

96 open issues indexed

GitHub link in docs points to ChainRulesCore.jl Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

JuliaDiff/ChainRules.jl#818 · Opened Feb 17, 2025
Replace withsomezeros_rewrap with ProjectTo Open

refactoring

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#815 · Opened Dec 29, 2024
`hcat` rule is wrong for `[I array]` Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#810 · Opened Oct 16, 2024
stack overflow issue Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

JuliaDiff/ChainRules.jl#809 · Opened Sep 26, 2024
Pullback for sparse-array vector product very inefficient Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#803 · 4 comments · Opened Jul 17, 2024
Avoid device-to-host copy in `∇getindex!` Open

GPU

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#800 · 2 comments · Opened Jun 19, 2024
Make the rrule for 3-arg dot lazy Open

JuliaDiff/ChainRules.jl#788 · 6 comments · 1 reaction · 1 assignee · Opened Mar 23, 2024
`frule` for `sum` doesn't work for `Generator` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#768 · 1 comment · Opened Jan 15, 2024
Make `OneElement` more GPU friendly Open

GPU help wanted

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaDiff/ChainRules.jl#767 · 1 reaction · Opened Jan 8, 2024
derivatives of more matrix functions Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#764 · 3 comments · Opened Dec 21, 2023
unzip CI broken on 1.0 Open

bug testing

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

JuliaDiff/ChainRules.jl#754 · Opened Nov 10, 2023
Scalar indexing error using prod(...) Open

GPU

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#747 · 1 comment · Opened Oct 24, 2023
No rules for `typed_hvcat` Open

missing rule

Difficulty 3/5 1-2 days Newbie friendliness 38/100

JuliaDiff/ChainRules.jl#743 · 1 comment · 2 reactions · Opened Sep 29, 2023
`rrule` for `mean(f, x)` is not vectorized? Open

GPU

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#733 · 2 comments · Opened Aug 17, 2023
Sparse vector to real power throws a pullback error Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#731 · Opened Aug 10, 2023
Missing frules for `copy` Open

good first issue missing rule

Difficulty 3/5 1-2 days Newbie friendliness 38/100

JuliaDiff/ChainRules.jl#729 · 1 comment · Opened Jul 27, 2023
Rules for `eachslice` with multiple `dims` Open

bug missing rule

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ChainRules.jl#722 · 2 comments · 3 reactions · Opened Jun 2, 2023
Wrong results for forward-mode `exp!` half of the time Open

JuliaDiff/ChainRules.jl#715 · 5 comments · 1 assignee · Opened May 17, 2023
Missing rules for Tridiagonal Open

missing rule

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#713 · 1 comment · Opened Apr 22, 2023
Returning `Broadcasted` cotangents for `Broadcasted` arguments? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaDiff/ChainRules.jl#698 · 7 comments · Opened Mar 13, 2023
Array `getindex` rule unable to handle Zero types and `NotImplemented` Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

JuliaDiff/ChainRules.jl#697 · 7 comments · Opened Mar 12, 2023
Rule for `typed_vcat`? Open

help wanted missing rule

Difficulty 4/5 3-5 days Newbie friendliness 30/100

JuliaDiff/ChainRules.jl#695 · 1 comment · Opened Feb 19, 2023
Add rules for `LinRange` Open

missing rule

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#692 · Opened Feb 10, 2023
`@fastmath maximum` broken on 1.10 Open

missing rule

Difficulty 3/5 1-2 days Newbie friendliness 38/100

JuliaDiff/ChainRules.jl#690 · Opened Jan 23, 2023
ERROR: LoadError: Some tests did not pass: 7126 passed, 7 failed, 4 errored, 0 broken. in expression starting at /home/ian/.julia/packages/ChainRules/Ipuva/test/runtests.jl:19 ERROR: Package ChainRules errored during testing Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

JuliaDiff/ChainRules.jl#688 · Opened Jan 10, 2023
`*(::AbstractVector, ::AbstractMatrix)` pullback triggers scalar indexing on the GPU Open

GPU help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#685 · 1 comment · Opened Nov 11, 2022
Rules for `kron` Open

good first issue missing rule

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#684 · 1 comment · Opened Nov 11, 2022
Pullback for `tr` produces a CPU `Diagonal` causing downstream scalar indexing on GPUs Open

good first issue GPU

Difficulty 3/5 1-2 days Newbie friendliness 48/100

JuliaDiff/ChainRules.jl#682 · 3 comments · Opened Oct 17, 2022
CI failing on julia 1.8.1 with Seg fault/memory error Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#677 · Opened Sep 21, 2022
Rule for `vect` unthunks many times Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#676 · Opened Sep 19, 2022
Rule for `foldl` fails on empty tuple Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

JuliaDiff/ChainRules.jl#672 · Opened Aug 29, 2022
Chainrule for CUDA reduction Open

good first issue missing rule

Difficulty 4/5 3-5 days Newbie friendliness 32/100

JuliaDiff/ChainRules.jl#666 · 4 comments · Opened Aug 20, 2022
svd_rev issue with orthogonal matricies Open

Difficulty 5/5 Over a week Newbie friendliness 32/100

JuliaDiff/ChainRules.jl#664 · 3 comments · Opened Aug 19, 2022
Dict gradients leading to addition error after broadcasting change Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#662 · 4 comments · Opened Aug 16, 2022
Remove closures for callable types Open

design needs-careful-thought performance

Difficulty 5/5 Over a week Newbie friendliness 20/100

JuliaDiff/ChainRules.jl#657 · 2 comments · Opened Aug 3, 2022
`rrule` for `Base.sum` should accept `init` keyword Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#656 · 3 comments · 1 reaction · Opened Aug 3, 2022
Remove `@non_differentiable` for `trunc`? Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#649 · 1 comment · Opened Jul 19, 2022
rrule causes scalar indexing for `repeat` Open

bug GPU

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#645 · 4 comments · Opened Jul 13, 2022
Support L, U and factors properties in Cholesky Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#640 · Opened Jun 28, 2022
`rrule` for `cov` Open

missing rule

Difficulty 4/5 3-5 days Newbie friendliness 30/100

JuliaDiff/ChainRules.jl#634 · 1 comment · Opened Jun 20, 2022
Rules that use scalar indexing are not GPU-compatible Open

GPU

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#617 · 3 comments · Opened May 12, 2022
Need adjoint for reinterpret SVector Open

missing rule

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#606 · 4 comments · Opened Apr 9, 2022
`rand!` is marked non-differentiable Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#603 · 2 comments · Opened Mar 28, 2022
`allequal` Compat issue with recent commit? Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

JuliaDiff/ChainRules.jl#598 · 14 comments · 1 reaction · Opened Mar 9, 2022
Non-associative number types Open

needs-careful-thought

Difficulty 5/5 Over a week Newbie friendliness 25/100

JuliaDiff/ChainRules.jl#594 · 4 comments · Opened Feb 28, 2022
rrule for multi-argument product Open

missing rule

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#589 · 1 comment · Opened Feb 15, 2022
`sortslices` only accepts `dims::Integer` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#583 · Opened Jan 25, 2022
Current rules for sqrt produce NaN for zero primal and (co)tangents Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

JuliaDiff/ChainRules.jl#576 · 2 comments · 1 reaction · Opened Jan 19, 2022
Gradients from keyword arguments dropped Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#567 · 5 reactions · Opened Jan 15, 2022
rrule for casting LinearAlgebra.QRCompactWYQ into a Matrix Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

JuliaDiff/ChainRules.jl#516 · 3 comments · Opened Aug 28, 2021

JuliaDiff/ChainRules.jl

Get new issues in your inbox