Bug#1127800: fenics-dolfinx autopkgtest timeout with the nanobind 2.11.0 rebuild

[Adrian Bunk]

Source: fenics-dolfinx
Version: 1:0.10.0.post5-5
Severity: serious
X-Debbugs-Cc: Timo Röhling <roehling at debian.org>, Drew Parsons <dparsons at debian.org>

https://ci.debian.net/packages/f/fenics-dolfinx/testing/amd64/68633187/
https://ci.debian.net/packages/f/fenics-dolfinx/testing/arm64/68633282/

...
5195s python/test/unit/io/test_vtkhdf.py 
10907s autopkgtest [07:46:29]: ERROR: timed out on command "su -s /bin/bash debci -c set -e; exec /tmp/autopkgtest-lxc.subk908k/downtmp/wrapper.sh --artifacts=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-unittests-artifacts --chdir=/tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src --env=AUTOPKGTEST_TESTBED_ARCH=amd64 --env=AUTOPKGTEST_TEST_ARCH=amd64 --env=DEB_BUILD_OPTIONS=parallel=48 --env=DEBIAN_FRONTEND=noninteractive --env=LANG=C.UTF-8 --unset-env=LANGUAGE --unset-env=LC_ADDRESS --unset-env=LC_ALL --unset-env=LC_COLLATE --unset-env=LC_CTYPE --unset-env=LC_IDENTIFICATION --unset-env=LC_MEASUREMENT --unset-env=LC_MESSAGES --unset-env=LC_MONETARY --unset-env=LC_NAME --unset-env=LC_NUMERIC --unset-env=LC_PAPER --unset-env=LC_TELEPHONE --unset-env=LC_TIME --script-pid-file=/tmp/autopkgtest_script_pid --source-profile --stderr=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-unittests-stderr --stdout=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-unittests-stdout --tmp=/tmp/autopkgtest-lxc.subk908k/downtmp/autopkgtest_tmp --make-executable=/tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src/debian/tests/test-dolfinx-python-unittests -- /tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src/debian/tests/test-dolfinx-python-unittests" (kind: test)
10907s autopkgtest [07:46:29]: test test-dolfinx-python-unittests: -----------------------]
10907s autopkgtest [07:46:29]: test test-dolfinx-python-unittests:  - - - - - - - - - - results - - - - - - - - - -
10907s test-dolfinx-python-unittests FAIL timed out
...
24411s python/test/unit/io/test_vtkhdf.py 
25867s autopkgtest [11:55:49]: ERROR: timed out on command "su -s /bin/bash debci -c set -e; exec /tmp/autopkgtest-lxc.subk908k/downtmp/wrapper.sh --artifacts=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-complex-unittests-artifacts --chdir=/tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src --env=AUTOPKGTEST_TESTBED_ARCH=amd64 --env=AUTOPKGTEST_TEST_ARCH=amd64 --env=DEB_BUILD_OPTIONS=parallel=48 --env=DEBIAN_FRONTEND=noninteractive --env=LANG=C.UTF-8 --unset-env=LANGUAGE --unset-env=LC_ADDRESS --unset-env=LC_ALL --unset-env=LC_COLLATE --unset-env=LC_CTYPE --unset-env=LC_IDENTIFICATION --unset-env=LC_MEASUREMENT --unset-env=LC_MESSAGES --unset-env=LC_MONETARY --unset-env=LC_NAME --unset-env=LC_NUMERIC --unset-env=LC_PAPER --unset-env=LC_TELEPHONE --unset-env=LC_TIME --script-pid-file=/tmp/autopkgtest_script_pid --source-profile --stderr=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-complex-unittests-stderr --stdout=/tmp/autopkgtest-lxc.subk908k/downtmp/test-dolfinx-python-complex-unittests-stdout --tmp=/tmp/autopkgtest-lxc.subk908k/downtmp/autopkgtest_tmp --make-executable=/tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src/debian/tests/test-dolfinx-python-complex-unittests -- /tmp/autopkgtest-lxc.subk908k/downtmp/build.qpg/src/debian/tests/test-dolfinx-python-complex-unittests" (kind: test)
25867s autopkgtest [11:55:49]: test test-dolfinx-python-complex-unittests: -----------------------]
25867s test-dolfinx-python-complex-unittests FAIL timed out
...
27701s autopkgtest [12:26:23]: @@@@@@@@@@@@@@@@@@@@ summary
27701s test-dolfinx-cpp     PASS
27701s test-dolfinx-cpp-complex PASS
27701s test-dolfinx-python-unittests FAIL timed out
27701s test-dolfinx-python-demos PASS
27701s test-dolfinx-python-complex-unittests FAIL timed out
27701s test-dolfinx-python-complex-demos PASS
27701s test-dolfinx-python-pusimp PASS



Seen on amd64 and arm64 in testing and unstable with passing reference tests,
indicating that there is a real regression resulting in a hang (or a huge slowdown).