MathOpt: python_math_opt_solver_test timeout on macOS

[Mizux]

Branches/Version

On main or v99bugfix (v9.10 branch)

OS

• Mac Intel/M1,
• Python [3.8,3.12]

Protocol:

git checkout main
git pull -r
cmake -S. -Bbuild -DBUILD_PYTHON=ON
cmake --build build -j
(cd build && ctest -R "python_math_opt_solver_test")

Expected:

Like on Linux

Test project /usr/local/google/home/corentinl/work/main/build
    Start 20: python_math_opt_solver_test
1/1 Test #20: python_math_opt_solver_test ......   Passed    0.47 sec

100% tests passed, 0 tests failed out of 1

Total Test time (real) =   0.51 sec

Observed:

Test project /usr/local/google/home/corentinl/work/main/build
    Start 20: python_math_opt_solver_test
# blocking...

Hypotheses

The GIL management is not done correctly (contrary to MPSolver or CP-SAT) making the callback test hang forever...

[rma350]

this is on linux or mac?

[arnabanimesh]

@rma350 mac

[Mizux]

seems fixed on main and v99bugfix

[rma350]

Do we have any idea what changed? I did not change the code. Is the change caused by a different version of pybind11/absl/python/proto? Or just unknown?

[Mizux]

Do we have any idea what changed? I did not change the code. Is the change caused by a different version of pybind11/absl/python/proto? Or just unknown?

a little bit of all of this + MathOpt do change since v9.10

git diff --shortstat v9.10..main ortools/math_opt/ 
 151 files changed, 5394 insertions(+), 1000 deletions(-)