Issues

• Native CTC: float32 grad error grows with the sequence length

  rwth-i6/returnn#1990 · Filter by author albertz opened on Oct 12, 2026

• RF: beam reorder of the self-attention cache through a back-pointer table

  rwth-i6/returnn#1983 · Filter by author polycrit opened on Oct 10, 2026
  1

• Move the Triton kernels to a backend-neutral returnn/triton package

  rwth-i6/returnn#1875 · Filter by author albertz opened on Sep 25, 2026

• Native fast Baum-Welch ops wrote into their state_buffer input (concurrent instances corrupted each other)

  rwth-i6/returnn#1836 · Filter by author albertz opened on Aug 11, 2026

• PytorchStreamWriter failed writing file data

  rwth-i6/returnn#1829 · Filter by author albertz opened on Jul 19, 2026

• Decouple accumulated gradient from logging

  rwth-i6/returnn#1820 · Filter by author Icemole opened on Mar 24, 2026

• test_torch_engine_sub_proc_cleanup failed: psutil.ZombieProcess: PID still exists but it's a zombie

  rwth-i6/returnn#1817 · Filter by author albertz opened on Mar 4, 2026
  1

• RuntimeError: CUDA error: an illegal memory access was encountered

  rwth-i6/returnn#1816 · Filter by author albertz opened on Mar 3, 2026
  3

• Hang in Torch copy_to_device cudaStreamSynchronize

  rwth-i6/returnn#1811 · Filter by author albertz opened on Jan 31, 2026
  6

• Torch profiler fails by default on pytorch==2.5.0

  rwth-i6/returnn#1810 · Filter by author dorian-K opened on Jan 30, 2026
  4

• Documentation outdated (2025)

  rwth-i6/returnn#1797 · Filter by author albertz opened on Dec 12, 2025

• FileCache no space left on device race condition

  rwth-i6/returnn#1792 · Filter by author albertz opened on Nov 7, 2025
  3

• MultiProcDataset + Postprocessing = CPU overcommit?

  rwth-i6/returnn#1780 · Filter by author NeoLegends opened on Oct 15, 2025
  6

• task eval broken for PyTorch engine

  rwth-i6/returnn#1779 · Filter by author Gerstenberger opened on Oct 13, 2025
  1

• Random access in datasets could be speed up by batched access, more structured shuffling

  rwth-i6/returnn#1777 · Filter by author albertz opened on Oct 7, 2025

• Dataset set_file_cache has no effect

  rwth-i6/returnn#1776 · Filter by author albertz opened on Oct 6, 2025
  

• test_ConvLayer_empty_out fails: InvalidArgumentError: Incompatible shapes: [7] vs. [1,1,5]

  rwth-i6/returnn#1775 · Filter by author albertz opened on Oct 6, 2025
  9

• devtrain dataset, reuse train dataset

  rwth-i6/returnn#1771 · Filter by author albertz opened on Sep 29, 2025

• Metrics reporting

  rwth-i6/returnn#1769 · Filter by author NeoLegends opened on Sep 24, 2025
  1

• MultiProcDataset, _get_random_seed_for_epoch in workers results in unexpected behavior

  rwth-i6/returnn#1762 · Filter by author albertz opened on Sep 18, 2025

• RF stft does not use consistent batch-independent padding

  rwth-i6/returnn#1761 · Filter by author albertz opened on Sep 6, 2025

• RF merge_dims with dyn dim last unexpected behavior

  rwth-i6/returnn#1757 · Filter by author albertz opened on Sep 3, 2025

• RF pad with dynamic left padding is wrong

  rwth-i6/returnn#1754 · Filter by author albertz opened on Aug 31, 2025

• RF native failed to compile / load, inconsistent behavior to pure Python, dividing a tensor of type int

  rwth-i6/returnn#1749 · Filter by author albertz opened on Aug 14, 2025
  3

• CI: Update PyCharm

  rwth-i6/returnn#1742 · Filter by author albertz opened on Jul 24, 2025