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BUG: walk_toposort spuriously raises 'graph contains cycles' on acyclic int-keyed graphs > 256 nodes

bugSomething isn't workingSomething isn't working

Status: Open.

#2170 In pymc-devs/pytensor;

· jaanerik opened on May 26, 2026

BUG: TypeError in local_subtensor_of_batch_dims when encountering stale broadcast types

bugSomething isn't workingSomething isn't working

Status: Open.

#2169 In pymc-devs/pytensor;

· jaanerik opened on May 26, 2026

Don't allow AdvancedSubtensor and AdvancedIncSubtensor non-consecutive advanced indices

indexing

Op implementation

Status: Open.

#2166 In pymc-devs/pytensor;

· ricardoV94 opened on May 24, 2026

support for __len__

enhancementNew feature or requestNew feature or request

Status: Open.

#2151 In pymc-devs/pytensor;

· williambdean opened on May 20, 2026

Canonicalize associative Op argument order and add distributive factorization for Add/Sub

graph rewriting

performance

Status: Open.

#2140 In pymc-devs/pytensor;

· ricardoV94 opened on May 16, 2026

Lift Elemwise through SetSubtensor

graph rewriting

Status: Open.

#2138 In pymc-devs/pytensor;

· ricardoV94 opened on May 15, 2026

Investigate infer_shape database

graph rewriting

needs infoAdditional information requiredAdditional information required

Op implementation

Status: Open.

#2137 In pymc-devs/pytensor;

· ricardoV94 opened on May 15, 2026

Useless integer casts in Alloc/Reshape shape arguments are not canonicalized away

beginner friendly

graph rewriting

Status: Open.

#2135 In pymc-devs/pytensor;

· ricardoV94 opened on May 14, 2026

Add CAReduce(DimShuffle(x)) -> CAReduce(x) rewrite when DimShuffle is a no-op for the reduction

graph rewriting

Status: Open.

#2132 In pymc-devs/pytensor;

· williambdean opened on May 13, 2026

Numba: Sum(ExpandDims(x)) returns incorrect result

bugSomething isn't workingSomething isn't working

Status: Open.

#2131 In pymc-devs/pytensor;

· williambdean opened on May 13, 2026

as_tensor_variable(range(n)) should work

beginner friendly

enhancementNew feature or requestNew feature or request

NumPy compatibility

Status: Open.

#2127 In pymc-devs/pytensor;

· williambdean opened on May 13, 2026

DOC: add citation files

docs

Status: Open.

#2119 In pymc-devs/pytensor;

· Romain-Thomas-Shef opened on May 9, 2026