Hindsight, seems to be a duplicate of: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1136873
On Mon, 29 Jun 2026 at 15:49, Ujjwal Sarswat <[email protected]> wrote: > Source: siconos > Severity: important > Tags: patch > X-Debbugs-Cc: [email protected] > > Dear Maintainer, > > I've encountered an issue while building `siconos` locally. The > `siconos.kernel` test suite fails during `test_bouncing_ball.py` with a > `ValueError: setting an array element with a sequence.` > > This is caused by stricter dimensionality enforcement in NumPy 2.4. It no > longer permits implicitly converting 1-dimensional arrays or sequences into > Python scalars when assigning to a specific coordinate in a pre-allocated > array. The value must be explicitly extracted as a scalar by appending > `[0]`. > > Relevant Traceback snippet: > ---------------------------------------------------------------------- > test_bouncing_ball.py::test_bouncing_ball2 FAILED [ > 50%] > test_bouncing_ball.py::test_bouncing_ball3 FAILED [ > 75%] > test_bouncing_ball.py::test_bouncing_ball4 FAILED > [100%] > > =================================== FAILURES > =================================== > _____________________________ test_bouncing_ball2 > ______________________________ > TypeError: only 0-dimensional arrays can be converted to Python scalars > > The above exception was the direct cause of the following exception: > [...] > # Get the values to be plotted > # ->saved in a matrix data > > s_d.computeOneStep() > > data = np.empty((nb_time_steps + 1, 5)) > data_d = np.empty((nb_time_steps + 1, 5)) > > data[0, 0] = t0 > data[0, 1] = ball.q()[0] > data[0, 2] = ball.velocity()[0] > data[0, 3] = ball.p(1)[0] > > data[0, 4] = inter.lambda_(1) > ^^^^^^^^^^ > E ValueError: setting an array element with a sequence. > > test_bouncing_ball.py:240: ValueError > ---------------------------------------------------------------------- > > Upstream context: > There is no need to forward this upstream. Upstream is currently working > on major architectural changes (currently on rc1) that remove or > significantly alter the directories associated with this bug. > > However, since those upstream changes will take time to finalize and land, > a simple interim patch indexing the array with `[0]` is necessary for > Debian to restore the build and pass the tests. > > This patch has been merged into Ubuntu. > > --- a/kernel/swig/tests/test_bouncing_ball.py > +++ b/kernel/swig/tests/test_bouncing_ball.py > @@ -237,13 +237,13 @@ > data[0, 1] = ball.q()[0] > data[0, 2] = ball.velocity()[0] > data[0, 3] = ball.p(1)[0] > - data[0, 4] = inter.lambda_(1) > + data[0, 4] = inter.lambda_(1)[0] > > data_d[0, 0] = t0 > data_d[0, 1] = ball_d.q()[0] > data_d[0, 2] = ball_d.velocity()[0] > data_d[0, 3] = ball_d.p(1)[0] > - data_d[0, 4] = inter_d.lambda_(1) > + data_d[0, 4] = inter_d.lambda_(1)[0] > > k = 1 > > Thanks, > vmpyr > > > -- System Information: > Debian Release: forky/sid > APT prefers resolute-updates > APT policy: (500, 'resolute-updates'), (500, 'resolute-security'), (500, > 'resolute') > Architecture: amd64 (x86_64) > > Kernel: Linux 7.0.0-22-generic (SMP w/16 CPU threads; PREEMPT) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE > not set > Shell: /bin/sh linked to /usr/bin/dash > Init: systemd (via /run/systemd/system) > LSM: AppArmor: enabled >
