Issues

• test_sampling_consistency (ZarrTrace) fails on ubuntu/numba/Python 3.14 CI

  Github CI/CDtests
  pymc-devs/pymc#8461 · Filter by author juanitorduz opened on Oct 1, 2026
  1

• BUG: Bernoulli(logit_p=...) has a nan gradient once logit_p is large, although logp is finite

  pymc-devs/pymc#8457 · Filter by author habakan opened on Sep 27, 2026
  1

• TruncatedNormal.logcdf returns nan at the lower bound instead of -inf

  pymc-devs/pymc#8454 · Filter by author feiiiiii5 opened on Sep 25, 2026
  2

• DiscreteUniform.logcdf is -inf at the lower bound

  pymc-devs/pymc#8451 · Filter by author anishmehta24 opened on Sep 24, 2026

• BUG: icdf loses precision in the far tails for Cauchy, Exponential and Weibull

  bug
  pymc-devs/pymc#8445 · Filter by author siddhant-shahhh opened on Sep 20, 2026
  1

• BUG: ADVI default optimizer adagrad_window biases posterior SDs upward (~8.5% on a conjugate Gaussian): the current gradient is inside its own normaliser

  bug
  pymc-devs/pymc#8444 · Filter by author Hashirama1337s opened on Sep 19, 2026
  1

• LogitNormal gets no default transform, unlike other unit-interval distributions

  pymc-devs/pymc#8441 · Filter by author AllenDowney opened on Sep 15, 2026
  3

• DOC: Fix raw LaTeX math syntax and grammar in GARCH11 docstring

  pymc-devs/pymc#8439 · Filter by author sonusharma6-dsa opened on Sep 14, 2026
  1

• BUG: Moyal logcdf returns -inf in lower tail where value is finite

  pymc-devs/pymc#8437 · Filter by author sonusharma6-dsa opened on Sep 14, 2026
  2

• BUG: Cauchy and StudentT logcdf return -inf in the lower tail where the true value is finite

  bug
  pymc-devs/pymc#8435 · Filter by author siddhant-shahhh opened on Sep 14, 2026

• DOC: Fix documentation formatting, LaTeX, parameter metadata, and type declarations in continuous distributions

  docs
  pymc-devs/pymc#8431 · Filter by author anurag-mds opened on Sep 13, 2026
  2

• BUG: HSGP set_boundary causes unhandled divide by zero and inf eigenvalues when feature range is zero

  pymc-devs/pymc#8427 · Filter by author sonusharma6-dsa opened on Sep 10, 2026
  2

• ENH: Enable batch size > 1 for CAR distribution

  feature request
  pymc-devs/pymc#8414 · Filter by author ckrapu opened on Aug 28, 2026
  3

• ENH: Render full symbolic expressions for Deterministics (and Potentials) in model representations — plain text and LaTeX

  pymc-devs/pymc#8407 · Filter by author drbenvincent opened on Aug 25, 2026
  1

• BUG: No Progressbar in Marimo Notebook with ADVI

  bug
  pymc-devs/pymc#8405 · Filter by author MathisC22 opened on Aug 21, 2026
  3

• Support symbolic eta parameter in LKJCholeskyCov.logp

  pymc-devs/pymc#8403 · Filter by author sankhyanreyansh opened on Aug 21, 2026

• check_parameters should support xtensor inputs

  pymc-devs/pymc#8398 · Filter by author williambdean opened on Aug 13, 2026
  1

• BUG: default fork worker segfaults for MvNormal/LKJ sampling on macOS arm64

  pymc-devs/pymc#8377 · Filter by author cetagostini opened on Jul 24, 2026
  1

• pm.sample segfaults on Apple Silicon: fork default + Accelerate BLAS

  bugmacOS
  pymc-devs/pymc#8372 · Filter by author jessegrabowski opened on Jul 20, 2026
  1

• BUG: pm.sample(nuts_sampler="blackjax") fails during warmup with every blackjax >= 1.6

  bugjaxsamplers
  pymc-devs/pymc#8367 · Filter by author janfb opened on Jul 16, 2026
  2

• BUG: nuts vectorized chain method arg raising in pymc>=6

  bug
  pymc-devs/pymc#8366 · Filter by author janfb opened on Jul 16, 2026

• BUG: JAX-backend fit leaves jax.Array in shared variable storage, breaking later numba-compiled functions (approx.sample)

  pymc-devs/pymc#8360 · Filter by author AlexanderFengler opened on Jul 13, 2026
  1

• BUG: pm.fit(..., backend="jax") fails for every model: ADVI approximation parameters lack static shapes

  pymc-devs/pymc#8359 · Filter by author AlexanderFengler opened on Jul 13, 2026
  1

• BUG: pm.sample can't disable init-value jitter for the external JAX samplers (numpyro/blackjax)

  bug
  pymc-devs/pymc#8352 · Filter by author AlexanderFengler opened on Jul 9, 2026
  5

• BUG: Long post-sampling compile times on large models with SMC sampler

  bug
  pymc-devs/pymc#8347 · Filter by author WarmCyan opened on Jul 2, 2026
  1