Columnstore doesn't build with gcc 12 (on Fedora Rawhide)

/home/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.8.0/storage/columnstore/columnstore/dbcon/execplan/arithmeticcolumn.cpp: In member function 'const std::string execplan::ArithmeticColumn::nextToken(std::__cxx11::basic_string<char>::size_type&, char) const':

/home/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.8.0/storage/columnstore/columnstore/dbcon/execplan/arithmeticcolumn.cpp:297:12: error: conversion from 'int' to 'const std::string' {aka 'const std::__cxx11::basic_string<char>'} is ambiguous

  297 |     return 0;

      |            ^

In file included from /usr/include/c++/12/string:53,

                 from /home/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.8.0/storage/columnstore/columnstore/dbcon/execplan/arithmeticcolumn.cpp:23:

/usr/include/c++/12/bits/basic_string.h:732:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(std::nullptr_t) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::nullptr_t = std::nullptr_t]' (deleted)

  732 |       basic_string(nullptr_t) = delete;

      |       ^~~~~~~~~~~~

/usr/include/c++/12/bits/basic_string.h:634:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'

  634 |       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())

      |       ^~~~~~~~~~~~