https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114410
--- Comment #7 from Cristian VOICA <cvoica at gmail dot com> ---
I've found a flag that sounds closer to my needs: -Wcast-qual
As the issue seems to me to come from the need to stay compatible with C I
think this flag does a pretty decent job to hint at the problem.
<source>: In function 'void bad_const_access(const A*)':
<source>:24:18: warning: cast from type 'const
Holder<std::__cxx11::basic_string<char> >*' to type 'std::string*' {aka
'std::__cxx11::basic_string<char>*'} casts away qualifiers [-Wcast-qual]
24 | std::cout << (std::string&)a->m_i << std::endl; //crash in gcc-13
but OK in gcc-12
| ^~~~~~~~~~~~~~~~~~~~
<source>:24:35: internal compiler error: in reference_binding, at
cp/call.cc:2020
24 | std::cout << (std::string&)a->m_i << std::endl; //crash in gcc-13
but OK in gcc-12
| ^~~
