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          <div class="chatlog__reply-author" title="k_bo">kebo</div>
          <div class="chatlog__reply-content"><span class="chatlog__reply-link" onclick="scrollToMessage(event,'1354860627402817689')"> <span class="chatlog__markdown-mention" title="swift60#4418">@swift-6.0.3</span> -enable-upcoming-feature ExistentialAny <span class="chatlog__markdown-mention" title="swift61#2812">@swift-6.1-dev</span> -enable-upcoming-feature ExistentialAny <span class="chatlog__markdown-mention" title="swift61#2812">@swift-6.1-dev</span> -enable-upcoming-feature ExistentialAny -Werror ExistentialAny <code class="chatlog__markdown-pre chatlog__markdown-pre--multiline language-swift">protocol P {} func hoge() -&gt; P { fatalError() }</code> </span> <span class="chatlog__reply-edited-timestamp" title="Thursday, March 27, 2025 4:55 PM">(edited)</span></div>
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        <div class="chatlog__header"><span class="chatlog__author" style="color:rgb(52,152,219)" title="swift61#2812" data-user-id="1308641516251643944">swift61</span> <span class="chatlog__author-tag">BOT</span> <a href="/channels/430242233468452865?category=main&amp;channel=swiftbot-sandbox&amp;message_id=1354861338647593152"><span class="chatlog__timestamp" title="Thursday, March 27, 2025 4:55 PM"></span></a><a href="#chatlog__message-container-1354861338647593152">3/27/2025 4:55 PM</a></div>
        <div class="chatlog__content chatlog__markdown"><span class="chatlog__markdown-preserve"><code class="chatlog__markdown-pre chatlog__markdown-pre--inline">swift -enable-upcoming-feature ExistentialAny -Werror ExistentialAny -</code> exit status: 1 with <code class="chatlog__markdown-pre chatlog__markdown-pre--multiline nohighlight">&lt;stdin&gt;:2:16: error: use of protocol 'P' as a type must be written 'any P'; this will be an error in a future Swift language mode 1 | protocol P {} 2 | func hoge() -&gt; P { fatalError() } | `- error: use of protocol 'P' as a type must be written 'any P'; this will be an error in a future Swift language mode 3 | </code></span></div>
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