https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88111
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks! I'll look through that when I get a chance.
For the iostream case I think it should always be possible to write size_t to a
stream, so we might want to solve it properly with overloads like:
--- a/libstdc++-v3/include/std/ostream
+++ b/libstdc++-v3/include/std/ostream
@@ -690,6 +690,26 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
#endif // C++11
+#if defined(__GLIBCXX_TYPE_INT_N_0)
+ template<typename _CharT, typename _Traits>
+ inline basic_ostream<_CharT, _Traits>&
+ operator<<(basic_ostream<_CharT, _Traits>& __os,
+ __GLIBCXX_TYPE_INT_N_0 __x)
+ {
+ __os << (__x + 0);
+ return __os;
+ }
+
+ template<typename _CharT, typename _Traits>
+ inline basic_ostream<_CharT, _Traits>&
+ operator<<(basic_ostream<_CharT, _Traits>& __os,
+ unsigned __GLIBCXX_TYPE_INT_N_0 __x)
+ {
+ __os << (__x + 0u);
+ return __os;
+ }
+#endif
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
