https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97415
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2020-10-14 Ever confirmed|0 |1 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- This should reproduce it, but doesn't for some reason: #include <bits/c++config.h> #undef _GLIBCXX_EXTERN_TEMPLATE #include <sstream> int main() { std::ostringstream s; s << "."; return s.str().length(); }