issue when using the assert macro in C++ with std::map [duplicate]

I’m encountering a puzzling issue when using the assert macro in C++20 with std::map:
Code (Fails to Compile):

#include <bits/stdc++.h>
using namespace std;

int main() {
    map<pair<int, int>, vector<int>> M0, M1;

    // Assertion fails to compile
    assert(M0[{1, 0}].size() == M1[{0, 1}].size());

    return 0;
}

Error Message:

error: macro "assert" passed 3 arguments, but takes just 1

Code (Compiles Successfully,Wrap the conditional statements in assert with ()):

#include <bits/stdc++.h>
using namespace std;

int main() {
    map<pair<int, int>, vector<int>> M0, M1;

    // Assertion compiles successfully
    assert((M0[{1, 0}].size() == M1[{0, 1}].size()));

    return 0;
}

Does this mean that "assert" has a bug?