#1148209 simgrid: FTBFS: /usr/include/pybind11/pybind11.h:2693:25: error: static assertion failed: def_property family does not currently support call_guard. Use a py::cpp_function instead.

#1148209#5
Date:
2026-09-17 23:45:28 UTC
From:
To:
Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202609/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:simgrid, so that this is still
visible in the BTS web page for this package.

Thanks.
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[...]
       |       ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  1052 |                              "Check whether trying to acquire the semaphore would block (in other word, checks whether "
       |                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  1053 |                              "this semaphore has capacity).")
       |                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/pybind11/pybind11.h:2693:25: error: static assertion failed: def_property family does not currently support call_guard. Use a py::cpp_function instead.
  2693 |         static_assert(0 == detail::constexpr_sum(detail::is_call_guard<Extra>::value...),
       |                       ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   • the comparison reduces to ‘(0 == 1)’
[100%] Linking CXX shared library ../../lib/libgriffon.so
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/examples/platforms && /usr/bin/cmake -E cmake_link_script CMakeFiles/griffon.dir/link.txt --verbose=1
/usr/bin/x86_64-linux-gnu-g++ -fPIC  -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -g3 -D_FORTIFY_SOURCE=2 -Wundef -O3 -funroll-loops -fno-strict-aliasing  -finline-functions  -ffile-prefix-map="/<<PKGBUILDDIR>>=.." -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -flto=auto -fno-fat-lto-objects -shared -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -Wl,-z,now -Wl,--dependency-file=CMakeFiles/griffon.dir/link.d -Wl,-soname,libgriffon.so -o ../../lib/libgriffon.so CMakeFiles/griffon.dir/griffon.cpp.o  -Wl,-rpath,/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/lib ../../lib/libsimgrid.so.4.1 /usr/lib/x86_64-linux-gnu/libboost_context.so.1.90.0 -lstdc++exp -lstdc++ -lm  -L/usr/lib/x86_64-linux-gnu -lns3-csma -lns3-point-to-point -lns3-applications -lns3-internet -lns3-bridge -lns3-traffic-control -lns3-wifi -lns3-energy -lns3-spectrum -lns3-buildings -lns3-propagation -lns3-mobility -lns3-antenna -lns3-network -lns3-stats -lns3-core /usr/lib/x86_64-linux-gnu/libdl.a -lrt -lgfortran   -Wl,--as-needed -latomic -Wl,--no-as-needed
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[100%] Built target griffon
make  -f examples/platforms/CMakeFiles/routing_cluster.dir/build.make examples/platforms/CMakeFiles/routing_cluster.dir/depend
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /<<PKGBUILDDIR>> /<<PKGBUILDDIR>>/examples/platforms /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/examples/platforms /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/examples/platforms/CMakeFiles/routing_cluster.dir/DependInfo.cmake "--color=" routing_cluster
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make  -f examples/platforms/CMakeFiles/routing_cluster.dir/build.make examples/platforms/CMakeFiles/routing_cluster.dir/build
make[4]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[100%] Building CXX object examples/platforms/CMakeFiles/routing_cluster.dir/routing_cluster.cpp.o
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/examples/platforms && /usr/bin/x86_64-linux-gnu-g++ -DBOOST_CONTEXT_DYN_LINK -DBOOST_CONTEXT_NO_LIB -Drouting_cluster_EXPORTS -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/include -I/<<PKGBUILDDIR>>/include -I/usr/include/libxml2 -I/usr/include/python3.13 -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -g3 -D_FORTIFY_SOURCE=2 -Wundef -O3 -funroll-loops -fno-strict-aliasing  -finline-functions  -ffile-prefix-map="/<<PKGBUILDDIR>>=.." -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++23 -flto=auto -fno-fat-lto-objects -fPIC -MD -MT examples/platforms/CMakeFiles/routing_cluster.dir/routing_cluster.cpp.o -MF CMakeFiles/routing_cluster.dir/routing_cluster.cpp.o.d -o CMakeFiles/routing_cluster.dir/routing_cluster.cpp.o -c /<<PKGBUILDDIR>>/examples/platforms/routing_cluster.cpp
make[4]: *** [CMakeFiles/python-bindings.dir/build.make:82: CMakeFiles/python-bindings.dir/src/bindings/python/simgrid_python.cpp.o] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[3]: *** [CMakeFiles/Makefile2:4474: CMakeFiles/python-bindings.dir/all] Error 2
make[3]: *** Waiting for unfinished jobs....
[100%] Linking CXX shared library ../../lib/librouting_cluster.so
cd /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/examples/platforms && /usr/bin/cmake -E cmake_link_script CMakeFiles/routing_cluster.dir/link.txt --verbose=1
/usr/bin/x86_64-linux-gnu-g++ -fPIC  -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -g3 -D_FORTIFY_SOURCE=2 -Wundef -O3 -funroll-loops -fno-strict-aliasing  -finline-functions  -ffile-prefix-map="/<<PKGBUILDDIR>>=.." -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -flto=auto -fno-fat-lto-objects -shared -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -Wl,-z,now -Wl,--dependency-file=CMakeFiles/routing_cluster.dir/link.d -Wl,-soname,librouting_cluster.so -o ../../lib/librouting_cluster.so CMakeFiles/routing_cluster.dir/routing_cluster.cpp.o  -Wl,-rpath,/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/lib ../../lib/libsimgrid.so.4.1 /usr/lib/x86_64-linux-gnu/libboost_context.so.1.90.0 -lstdc++exp -lstdc++ -lm  -L/usr/lib/x86_64-linux-gnu -lns3-csma -lns3-point-to-point -lns3-applications -lns3-internet -lns3-bridge -lns3-traffic-control -lns3-wifi -lns3-energy -lns3-spectrum -lns3-buildings -lns3-propagation -lns3-mobility -lns3-antenna -lns3-network -lns3-stats -lns3-core /usr/lib/x86_64-linux-gnu/libdl.a -lrt -lgfortran   -Wl,--as-needed -latomic -Wl,--no-as-needed
make[4]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[100%] Built target routing_cluster
make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[2]: *** [Makefile:169: all] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j2 INSTALL="install --strip-program=true" all tests manpages VERBOSE=1 returned exit code 2
make[1]: *** [debian/rules:51: override_dh_auto_build] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:33: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
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