Generating hash with Argon2 on Botan results in garbage data and 0xC0000005: Access violation reading location 0x0000000100000000

  argon2-ffi, botan, c++, cryptography

I’m trying to hash passwords using the C++ cryptography library Botan. I’ve tried testing out the library using the code below:

#include <iostream>
#include <string>
#include <botan/argon2.h>
#include <botan/system_rng.h>

int main() {
    Botan::System_RNG rng;
    std::string password = "cool_password";

    std::string generated_hash = Botan::argon2_generate_pwhash(password.c_str(), password.length(), rng, 1, 4000, 1);
    std::cout << generated_hash << "n";
}

but the code either printed garbage data, or gave me a runtime error:
Unhandled exception at 0x00007FFEF11825E0 (ucrtbased.dll) in app.exe: 0xC0000005: Access violation reading location 0x0000000100000000.

What should I do? Using other hashing methods such as Botan::generate_bcrypt() also resulted in the same error.

Source: Windows Questions C++

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