https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119076
--- Comment #3 from trinxery at firemail dot cc --- and main.cxx is: # 0 "./main.cxx" # 0 "<built-in>" # 0 "<command-line>" # 1 "/usr/include/stdc-predef.h" 1 3 4 # 0 "<command-line>" 2 # 1 "./main.cxx" import "././include/nlohmann/json.hpp" [[__translated]]; # 1 "/usr/include/c++/15/iostream" 1 3 # 40 "/usr/include/c++/15/iostream" 3 # 1 "/usr/include/c++/15/bits/requires_hosted.h" 1 3 # 41 "/usr/include/c++/15/iostream" 2 3 # 1 "/usr/include/x86_64-linux-gnu/c++/15/bits/c++config.h" 1 3 # 43 "/usr/include/c++/15/iostream" 2 3 # 1 "/usr/include/c++/15/ostream" 1 3 # 44 "/usr/include/c++/15/iostream" 2 3 # 1 "/usr/include/c++/15/istream" 1 3 # 45 "/usr/include/c++/15/iostream" 2 3 # 46 "/usr/include/c++/15/iostream" 3 namespace std __attribute__ ((__visibility__ ("default"))) { # 64 "/usr/include/c++/15/iostream" 3 extern istream cin; extern ostream cout; extern ostream cerr; extern ostream clog; extern wistream wcin; extern wostream wcout; extern wostream wcerr; extern wostream wclog; # 84 "/usr/include/c++/15/iostream" 3 __extension__ __asm (".globl _ZSt21ios_base_library_initv"); } # 3 "./main.cxx" 2 # 3 "./main.cxx" int main() { std::cout << nlohmann::json{}; }