Issues

• CP-SAT 9.15: IndexError: absl::btree_map::at in presolve with a complete feasible solution hint (regression vs 9.14)

  google/or-tools#5593 · Filter by author ficek10 opened on Nov 14, 2026

• CP-SAT 9.15.6755: OPTIMAL reported above the true optimum depending on the solution hint (avoided by presolve_inclusion_work_limit: 0)

  Lang: PythonOS: MacSolver: CP-SAT Solver
  google/or-tools#5582 · Filter by author cheenbabes opened on Nov 10, 2026 · v10.0
  

• MacOS 27: bazel build fail

  Build: BazelLang: C++
  google/or-tools#5581 · Filter by author Mizux opened on Nov 9, 2026 · v10.0
  2

  

• CP-SAT: incompatible-linear implication counts grow across presolve iterations with unchanged model size (9.15)

  BugLang: PythonSolver: CP-SAT Solver
  google/or-tools#5559 · Filter by author shangdidemaomi-maker opened on Nov 2, 2026 · v10.0
  1

  

• Python package protobuf version inconsistency

  DependenciesHelp NeededLang: Python
  google/or-tools#5547 · Filter by author GasparQ opened on Oct 29, 2026 · v10.0
  2

  

• CP-SAT aborts (CHECK failure in cp_model_expand.cc) on an infeasible table model when cp_model_presolve is false

  BugSolver: CP-SAT Solver
  google/or-tools#5531 · Filter by author JeetuSK0808 opened on Oct 25, 2026 · v10.0
  1

  

• CMake: alpine java tests failed

  Build: CMakeCI FailureDockerLang: Java
  google/or-tools#5528 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  2

  

• release: alpine test java export not working

  Build: CMakeCI FailureDockerLang: Java
  google/or-tools#5526 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  

• CMake: cxx_glop_revised_simplex_test flackiness

  BugBuild: CMakeCI FailureLang: C++Solver: GLOP
  google/or-tools#5524 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  2

  

• ci: docker ubuntu x bazel:

  BugBuild: BazelCI FailureDocker
  google/or-tools#5523 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  

• ci: docker opensuse x bazel: codegen link failure

  Build: BazelCI FailureDocker
  google/or-tools#5522 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  

• ci: docker debian x Bazel: routing test fail

  BugBuild: BazelCI FailureDocker
  google/or-tools#5521 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  

• ci: Windows x Bazel: Build fail

  BugBuild: BazelCI FailureOS: Windows
  google/or-tools#5520 · Filter by author Mizux opened on Oct 22, 2026 · v10.0
  

• Resource: verified optima + 2x-rerun deterministic verifier for binpacking/TSP/JSSP/cache (free 5-instance smoke pack)

  google/or-tools#5519 · Filter by author chunxiaoxx opened on Oct 21, 2026 · v10.0

• Python 3.14 Windows wheel: Smart App Control blocks unsigned cp_model_helper (9.15.6755)

  Help Needed
  google/or-tools#5474 · Filter by author KUMU-AI opened on Oct 11, 2026 · v10.0
  1

• CP-SAT: objective_value differs from the returned solution after lin_max presolve

  BugSolver: CP-SAT Solver
  google/or-tools#5453 · Filter by author ciriousjoker opened on Oct 3, 2026 · v10.0
  1

  

• java: some MathOpt test failed on Alpine

  BugDockerLang: JavaSolver: MathOpt
  google/or-tools#5429 · Filter by author Mizux opened on Sep 25, 2026 · v10.0
  

• RoutingModel.AddSameActivityGroup unusable from Python — TypeError: argument 2 of type 'absl::Span< int const >'

  BugFeature RequestLang: PythonSolver: Routing & CP Solver
  google/or-tools#5415 · Filter by author PedroOliveira117 opened on Sep 23, 2026 · v10.0
  1

  

• CP-SAT: reproducible first-solution difference between a model with this 21,058-term objective and the same proto with the objective field cleared (Instance23, NRP)

  Help NeededSolver: CP-SAT Solver
  google/or-tools#5400 · Filter by author hyojunguy opened on Sep 20, 2026 · v10.0
  3

  

• python: migrate example/contrib to pybind11

  BugBuild: CMakeLang: Python
  google/or-tools#5398 · Filter by author Mizux opened on Sep 18, 2026 · v10.0
  

• SetCoverLagrangian: stale ThreePhase() declaration, and ComputeLowerBound() segfaults if UseNumThreads() was not called

  BugSolver: Set Cover
  google/or-tools#5341 · Filter by author jg-codes opened on Sep 5, 2026 · v10.0
  

• CP-SAT 9.15.6755: memory-safety regression building large models — std::bad_alloc via repr(IntVar) and heap corruption (0xC0000374) via IntVar.Proto() (works on 9.14)

  Solver: CP-SAT Solver
  google/or-tools#5297 · Filter by author IDrei opened on Aug 19, 2026 · v10.0
  1

  

• # CP-SAT returns a false INFEASIBLE at the root (0 conflicts, 0 branches) with num_search_workers >= 10 and cp_model_presolve = false

  Solver: CP-SAT Solver
  google/or-tools#5295 · Filter by author smoniz opened on Aug 14, 2026 · v10.0
  1

  

• Distributing or-tools with a cpython whl

  BugBuild: CMakeLang: Python
  google/or-tools#5287 · Filter by author sjanzou opened on Aug 6, 2026 · v10.0
  4

  

• AddDimensionWithVehicleTransitAndCapacity returns no solution with optional nodes when capacity requires dropping visits

  Help NeededLang: .NETSolver: Routing & CP Solver
  google/or-tools#5283 · Filter by author hjongit opened on Aug 3, 2026 · v10.0