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Michael Davidsaver 88f09659e4 Workaround apparent g++12 spurious error

In file included from ../testshared.cpp:12:
In constructor ‘pvxs::shared_array<E, Enable>::shared_array(size_t, V) [with V = std::nullptr_t; E = std::unique_ptr<unsigned int>; Enable = void]’,
    inlined from ‘void {anonymous}::testComplex()’ at ../testshared.cpp:225:57:
../../src/pvxs/sharedArray.h:288:17: error: pointer used after ‘void operator delete [](void*, std::size_t)’ [-Werror=use-after-free]
  288 |         :base_t(new _E_non_const[c], c)
      |                 ^~~~~~~~~~~~~~~~~~~
In member function ‘void pvxs::detail::sa_default_delete<E>::operator()(E*) const [with E = std::unique_ptr<unsigned int>]’,
    inlined from ‘std::__shared_count<_Lp>::__shared_count(_Ptr, _Deleter, _Alloc) [with _Ptr = std::unique_ptr<unsigned int>*; _Deleter = pvxs::detail::sa_default_delete<std::unique_ptr<unsigned int> >; _Alloc = std::allocator<void>; <template-parameter-2-4> = void; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’ at /usr/include/c++/12/bits/shared_ptr_base.h:958:11,
    inlined from ‘std::__shared_count<_Lp>::__shared_count(_Ptr, _Deleter) [with _Ptr = std::unique_ptr<unsigned int>*; _Deleter = pvxs::detail::sa_default_delete<std::unique_ptr<unsigned int> >; <template-parameter-2-3> = void; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’ at /usr/include/c++/12/bits/shared_ptr_base.h:939:57,
    inlined from ‘std::__shared_ptr<_Tp, _Lp>::__shared_ptr(_Yp*, _Deleter) [with _Yp = std::unique_ptr<unsigned int>; _Deleter = pvxs::detail::sa_default_delete<std::unique_ptr<unsigned int> >; <template-parameter-2-3> = void; _Tp = std::unique_ptr<unsigned int>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’ at /usr/include/c++/12/bits/shared_ptr_base.h:1478:17,
    inlined from ‘std::shared_ptr<_Tp>::shared_ptr(_Yp*, _Deleter) [with _Yp = std::unique_ptr<unsigned int>; _Deleter = pvxs::detail::sa_default_delete<std::unique_ptr<unsigned int> >; <template-parameter-2-3> = void; _Tp = std::unique_ptr<unsigned int>]’ at /usr/include/c++/12/bits/shared_ptr.h:232:48,
    inlined from ‘pvxs::detail::sa_base<E>::sa_base(A*, size_t) [with A = std::unique_ptr<unsigned int>; E = std::unique_ptr<unsigned int>]’ at ../../src/pvxs/sharedArray.h:136:10,
    inlined from ‘pvxs::shared_array<E, Enable>::shared_array(size_t, V) [with V = std::nullptr_t; E = std::unique_ptr<unsigned int>; Enable = void]’ at ../../src/pvxs/sharedArray.h:288:39,
    inlined from ‘void {anonymous}::testComplex()’ at ../testshared.cpp:225:57:
../../src/pvxs/sharedArray.h:92:35: note: call to ‘void operator delete [](void*, std::size_t)’ here
   92 |     void operator()(E* e) const { delete[] e; }
      |                                   ^~~~~~~~~~

2023-07-17 09:30:37 -07:00