clang++ shared_ptr with control flow integrity crashes

[ambiso]

The following program:

#include <memory>

struct X {
    X() {}
    virtual ~X() {};
};

int main() {
    std::shared_ptr<X> _asd = std::make_shared<X>();
    return 0;
}

Compiled with:

$ clang++ -fsanitize=cfi-unrelated-cast -fvisibility=hidden -flto -O2 -std=c++14 test.cc

on

$ clang++ --version
clang version 13.0.0
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

crashes:

$ ./a.out
[1]    21670 illegal hardware instruction (core dumped)  ./a.out

I don't see any reason that it should crash - am I doing something wrong?

Here's the gef context one instruction before the crashing instruction (ud1):

Please let me know if there's any more information that I could provide!
Best,
ambiso

[ambiso]

This may be a regression from #48337 ?