JuniorTheoryOccasional

What does the program print?

C++

#include <iostream>

int main() {
    std::cout << "A";
    return 0;
    std::cout << "B";
}

Expecting AB: return ends main at once, so the statement after it never runs.
Expecting a compile error: code after return compiles, but it never runs.

Why does the compiler accept the line printing B, even though it can never run?
Is output sent to std::cout without a trailing newline still printed when main returns?