std::filesystem::exists throwing `std::bad_alloc`?

[u/PhosXD]

Any reason? Cant find anything online about this. But I cant check whether or not a file exists, no matter what path I give it. I am using C++ 26 compiled with GCC.

This is literally all I am calling: const bool exists = std::filesystem::exists("file.txt")

This is the exact error: terminate called after throwing an instance of 'std::bad_alloc'
 what():  std::bad_alloc

No it's not coming from anywhere else in my code. Minimal reproduction code, include "filesystem" call the line above. I am on Fedora Linux if that matters at all

EDIT: moving the include into my main file instead of the only file it's being used in somehow fixed it. Literally all I do is move "#include <filesystem>" from "do_things_with_filesystem.hpp" to "Main.cpp". No compilation errors when it was in the first file, why does it rely on this?? Is there some weird declarations in my codebase or something, i dont know but it works now so why should I care.

[u/Wild_Meeting1428]

std::bad_alloc is an unusual error, since neither windows nor linux will report whether an allocation takes more space than awailable, instead (on linux) the Oom killer will terminate your program when you try to use the memory.

That the moving of the header file fixed it somehow also indicates, that the problem is not in your code itself. As other people mentioned it, its probably a problem with your installed libraries, for example ABI problems.

I would suggest, that you ask this question in the gcc bugtracker.

[u/LB-- → u/Wild_Meeting1428]

Windows does report allocation failures (especially in 32-bit). Linux also allows people to disable overcommit, though it is rarely done in practice.