FTBFS on 24.10: `‘MEM[(struct function &)&D.24324 + 112]._M_invoker’ may be used uninitialized`

[Saviq]

In member function ‘__ct ’,
    inlined from ‘_Construct’ at /usr/include/c++/14/bits/stl_construct.h:119:7,
    inlined from ‘_M_construct’ at /usr/include/c++/14/optional:274:19,
    inlined from ‘__ct ’ at /usr/include/c++/14/optional:151:22,
    inlined from ‘__ct ’ at /usr/include/c++/14/optional:147:7,
    inlined from ‘__ct_base ’ at /usr/include/c++/14/optional:395:42,
    inlined from ‘__ct ’ at /usr/include/c++/14/optional:429:57,
    inlined from ‘__ct ’ at /usr/include/c++/14/optional:542:9,
    inlined from ‘__ct ’ at /usr/include/c++/14/optional:703:11,
    inlined from ‘__ct ’ at /usr/src/wlcs-1.7.0+dev91-g7cb0947-0ubuntu24.10/tests/xdg_popup.cpp:132:8,
    inlined from ‘Values’ at /usr/include/gtest/gtest-param-test.h:336:20,
    inlined from ‘gtest_DefaultXdgPopupPositionerTest_EvalGenerator_’ at /usr/src/wlcs-1.7.0+dev91-g7cb0947-0ubuntu24.10/tests/xdg_popup.cpp:733:1:
/usr/include/c++/14/bits/std_function.h:405:42: error: ‘MEM[(struct function &)&D.24324 + 112]._M_invoker’ may be used uninitialized [-Werror=maybe-uninitialized]
  405 |       : _Function_base(), _M_invoker(__x._M_invoker)
      |                                          ^
/usr/src/wlcs-1.7.0+dev91-g7cb0947-0ubuntu24.10/tests/xdg_popup.cpp: In function ‘gtest_DefaultXdgPopupPositionerTest_EvalGenerator_’:
/usr/src/wlcs-1.7.0+dev91-g7cb0947-0ubuntu24.10/tests/xdg_popup.cpp:733:1: note: ‘<anonymous>’ declared here