<p>BTW, to please <a href="https://github.com/elextr" class="user-mention">@elextr</a> here's a C++ overloaded version for testing (behaves correctly with all versions AFAICT):</p>

<div class="highlight highlight-source-c++"><pre><span class="pl-k">class</span> <span class="pl-en">Foo</span> {
<span class="pl-k">public:</span>

    <span class="pl-k">int</span> <span class="pl-en">method</span>(<span class="pl-k">void</span>);
    <span class="pl-k">int</span> <span class="pl-en">method</span>(<span class="pl-k">int</span> x);
    <span class="pl-k">int</span> <span class="pl-en">method</span>(<span class="pl-k">int</span> x, <span class="pl-k">int</span> y);
    <span class="pl-k">int</span> <span class="pl-en">method</span>(<span class="pl-k">float</span> x);

    <span class="pl-en">Foo</span>() {
        <span class="pl-c1">method</span>();
    }
};

<span class="pl-k">int</span> <span class="pl-en">Foo::method</span>() { <span class="pl-k">return</span> <span class="pl-c1">0</span>; }
<span class="pl-k">int</span> <span class="pl-en">Foo::method</span>(<span class="pl-k">int</span> x) { <span class="pl-k">return</span> x; }
<span class="pl-k">int</span> <span class="pl-en">Foo::method</span>(<span class="pl-k">int</span> x, <span class="pl-k">int</span> y) { <span class="pl-k">return</span> x * y; }
<span class="pl-k">int</span> <span class="pl-en">Foo::method</span>(<span class="pl-k">float</span> x) { <span class="pl-k">return</span> <span class="pl-k">static_cast</span><<span class="pl-k">int</span>>(x); }</pre></div>

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