Issues

• Gen3 navigator gets lost in a volume with rMin = 0

  acts-project/acts#6267 · Filter by author madbaron opened on Oct 9, 2026

• traccc CUDA triplet seeding: doublet count and fill can disagree (suspected FMA / inlining difference)

  acts-project/acts#6158 · Filter by author paulgessinger opened on Sep 25, 2026
  1

• GNN metric learning chain finds no tracks: all edges dropped at the filter classifier

  Bug
  acts-project/acts#5911 · Filter by author paulgessinger opened on Aug 19, 2026
  3

• Broken documentation links detected

  broken-links
  acts-project/acts#5887 · Filter by author github-actions opened on Aug 15, 2026
  51

  

• Building traccc against non-installed ROCm version

  Stale
  acts-project/acts#5877 · Filter by author StewMH opened on Aug 13, 2026
  11

• Deprecating BoundIndices: full-tree survey of the 1554 remaining call sites, and where the accessor design does not yet reach

  Component - CoreEvent Data ModelImprovementStale
  acts-project/acts#5737 · Filter by author paulgessinger opened on Jul 24, 2026
  1

• Compilation problem with ModuleMapCuda.cu on aarch64 with CMAKE_CUDA_STANDARD 23

  acts-project/acts#5705 · Filter by author elmsheus opened on Jul 18, 2026
  9

• Future of Navigation package

  Stale
  acts-project/acts#5677 · Filter by author andiwand opened on Jul 13, 2026
  2

• Add Python bindings to Detray

  Component - DetrayStale
  acts-project/acts#5627 · Filter by author VladimirDrobny opened on Jul 1, 2026
  1

• Development Item: python displaying infrastructure

  Stale
  acts-project/acts#5615 · Filter by author asalzburger opened on Jun 25, 2026
  4

• Axis produces underflow and overflow bins unconditionally

  Stale
  acts-project/acts#5602 · Filter by author andiwand opened on Jun 18, 2026
  3

• Grid and MultiAxis related naming

  Stale
  acts-project/acts#5601 · Filter by author andiwand opened on Jun 18, 2026
  3

• Example for track fitting with GBL

  Stale
  acts-project/acts#5544 · Filter by author chrishanw opened on Jun 4, 2026
  2

  

• Ordering in the actor chain state tuple is not preserved

  Component - DetrayStale
  Bug

  acts-project/acts#5517 · Filter by author niermann999 opened on May 27, 2026
  1

• Rework digitization for Gen3 geometry

  Stale
  acts-project/acts#5401 · Filter by author benjaminhuth opened on Apr 30, 2026
  1

• Integrate the irregular grid types into the metadata generator

  Component - DetrayStale
  Task

  acts-project/acts#5484 · Filter by author niermann999 opened on Apr 17, 2026
  1

• Update geometry files and remove backwards compatibility with old json fields

  Component - DetrayStale
  Task

  acts-project/acts#5483 · Filter by author niermann999 opened on Apr 8, 2026
  1

• clang21/22 compilation issue with CMAKE_CXX_STANDARD=23

  Stale
  acts-project/acts#5187 · Filter by author elmsheus opened on Mar 3, 2026
  12

  

• bug: cmake -DACTS_BUILD_PLUGIN_ACTSVG=on requires -DCMAKE_CXX_STANDARD=20

  Stale
  acts-project/acts#4952 · Filter by author timadye opened on Jan 12, 2026
  4

• DirectNavigator can fail in rare cases with CylinderSurfaces

  Stale
  acts-project/acts#4892 · Filter by author andiwand opened on Dec 9, 2025
  2

• GX2F with MDT (monitored drift tubes)

  Long Term
  acts-project/acts#4843 · Filter by author AJPfleger opened on Dec 1, 2025
  3

  

• Unable to build unit tests without ROOT

  Stale
  acts-project/acts#4746 · Filter by author DJDuque opened on Oct 30, 2025
  2

• SympyStepper causes an exception on volume material backward propagation

  Stale
  acts-project/acts#4731 · Filter by author andiwand opened on Oct 24, 2025
  1

• Matching data of multiple files in Examples

  Stale
  acts-project/acts#4717 · Filter by author CouthuresJeremy opened on Oct 17, 2025
  1

• bug: pytest segfault LCG107 clang19

  Stale
  Bug

  acts-project/acts#4614 · Filter by author AJPfleger opened on Sep 3, 2025
  5