user/rttr: FTBFS (armv7): variant_data_policy.h:433:9: error: ‘new’ of ‘initializer_list’ does not extend the lifetime of the underlying array

Found on armv7 using zv/gcc-next:

...
In file included from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_impl.h:36,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/variant.h:1157,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/type/get_create_variant_func.h:32,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/type/type_impl.h:36,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/type.h:1221,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/type:31,
                 from /usr/src/packages/user/rttr/src/rttr-0.9.6/src/unit_tests/variant_sequential_view/variant_sequential_view_test.cpp:30:
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h: In instantiation of ‘static void rttr::detail::variant_data_policy_small<T, Converter>::create(U&&, rttr::detail::variant_data&) [with U = std::initializer_list<int>&; T = std::initializer_list<int>; Converter = rttr::detail::empty_type_converter<std::initializer_list<int> >; rttr::detail::variant_data = std::aligned_storage<8, 8>::type]’:
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_impl.h:64:39:   required from ‘rttr::variant::variant(T&&) [with T = std::initializer_list<int>&; Tp = std::initializer_list<int>]’
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/unit_tests/variant_sequential_view/variant_sequential_view_test.cpp:238:23:   required from here
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h:433:9: error: ‘new’ of ‘initializer_list’ does not extend the lifetime of the underlying array [-Werror=init-list-lifetime]
  433 |         new (&dest) T(std::forward<U>(value));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h: In instantiation of ‘static void rttr::detail::variant_data_policy_small<T, Converter>::clone(const T&, rttr::detail::variant_data&) [with T = std::initializer_list<int>; Converter = rttr::detail::empty_type_converter<std::initializer_list<int> >; rttr::detail::variant_data = std::aligned_storage<8, 8>::type]’:
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h:236:26:   required from ‘static bool rttr::detail::variant_data_base_policy<T, Tp, Converter>::invoke(rttr::detail::variant_policy_operation, const rttr::detail::variant_data&, rttr::detail::argument_wrapper) [with T = std::initializer_list<int>; Tp = rttr::detail::variant_data_policy_small<std::initializer_list<int>, rttr::detail::empty_type_converter<std::initializer_list<int> > >; Converter = rttr::detail::empty_type_converter<std::initializer_list<int> >; rttr::detail::variant_data = std::aligned_storage<8, 8>::type]’
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_impl.h:59:14:   required from ‘rttr::variant::variant(T&&) [with T = std::initializer_list<int>&; Tp = std::initializer_list<int>]’
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/unit_tests/variant_sequential_view/variant_sequential_view_test.cpp:238:23:   required from here
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h:421:9: error: ‘new’ of ‘initializer_list’ does not extend the lifetime of the underlying array [-Werror=init-list-lifetime]
  421 |         new (&dest) T(value);
      |         ^~~~~~~~~~~~~~~~~~~~
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h: In instantiation of ‘static void rttr::detail::variant_data_policy_small<T, Converter>::swap(T&, rttr::detail::variant_data&) [with T = std::initializer_list<int>; Converter = rttr::detail::empty_type_converter<std::initializer_list<int> >; rttr::detail::variant_data = std::aligned_storage<8, 8>::type]’:
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h:241:25:   required from ‘static bool rttr::detail::variant_data_base_policy<T, Tp, Converter>::invoke(rttr::detail::variant_policy_operation, const rttr::detail::variant_data&, rttr::detail::argument_wrapper) [with T = std::initializer_list<int>; Tp = rttr::detail::variant_data_policy_small<std::initializer_list<int>, rttr::detail::empty_type_converter<std::initializer_list<int> > >; Converter = rttr::detail::empty_type_converter<std::initializer_list<int> >; rttr::detail::variant_data = std::aligned_storage<8, 8>::type]’
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_impl.h:59:14:   required from ‘rttr::variant::variant(T&&) [with T = std::initializer_list<int>&; Tp = std::initializer_list<int>]’
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/unit_tests/variant_sequential_view/variant_sequential_view_test.cpp:238:23:   required from here
/usr/src/packages/user/rttr/src/rttr-0.9.6/src/rttr/../rttr/detail/variant/variant_data_policy.h:426:9: error: ‘new’ of ‘initializer_list’ does not extend the lifetime of the underlying array [-Werror=init-list-lifetime]
  426 |         new (&dest) T(value);
      |         ^~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[2]: *** [src/unit_tests/CMakeFiles/unit_tests.dir/build.make:930: src/unit_tests/CMakeFiles/unit_tests.dir/variant_sequential_view/variant_sequential_view_test.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:279: src/unit_tests/CMakeFiles/unit_tests.dir/all] Error 2
make: *** [Makefile:156: all] Error 2
>>> ERROR: rttr: build failed

20240604-17_07_37.231594309_rttr.log

added GCC 13 label

Warning was introduced in https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=04eb9c55747cc28466875e891ac22acb3ea67644, first available in 9.1.0, which was after our previous 8.5.0.

This package uses -Werror, so the introduction of a "new" warning caused the build to fail.

mentioned in commit f7d0d377

mentioned in commit 251a4f7d

mentioned in commit 2a5143ac

mentioned in commit 673e2517

mentioned in commit d537e440

mentioned in commit b73fa621

mentioned in commit 371353aa

closed with commit 371353aa