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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/wingo/statuses/116046576602548271">Andy Wingo (wingo@mastodon.social)'s status on Wednesday, 11-Feb-2026 01:44:32 JST</a><a href="https://mastodon.social/@wingo" title="wingo@mastodon.social"><img src="https://gnusocial.jp/avatar/43062-48-20221129232944.webp" width="48" height="48" alt="Andy Wingo" style="position: absolute; left: 0; top: 0;">Andy Wingo</a><div><a href="https://mastodon.cr.yp.to/@djb/116046564454248164" rel="in-reply-to">in reply to</a><ul><li><li><a href="https://gnusocial.jp/user/256410" title="djb@mastodon.cr.yp.to">Daniel J. Bernstein</a></li></ul></div></section><article><p><a href="https://mastodon.cr.yp.to/@djb">@djb</a> <a href="https://infosec.exchange/@barubary">@barubary</a> oh that is funny <a href="https://godbolt.org/z/jYc5vjene" rel="nofollow">https://godbolt.org/z/jYc5vjene</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/6142122#notice-12096870">In conversation</a><time datetime="2026-02-11T01:44:32+09:00" title="Wednesday, 11-Feb-2026 01:44:32 JST">about 6 months ago</time> <span>from <span><a href="https://mastodon.social/@wingo/116046576602548271" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@wingo/116046576602548271">permalink</a><h4>Attachments</h4><ol><li><article><header><div>Domain not in remote thumbnail source whitelist: raw.githubusercontent.com</div><h5><a href="https://godbolt.org/z/jYc5vjene">Compiler Explorer - C (x86-64 gcc 14.2)</a></h5><div> from <span>Matt Godbolt</span></div></header><div>void foo(void *x) {
    int i;
    if (isnan(*(float *) x))
    memcpy(&amp;i,x,4);
    printf("%x\n",i);
}void bar(void *x) {
    int i;
    memcpy(&amp;i,x,4);
    printf("%x\n",i);
}int main() {
    float x = __builtin_nansf("");
    foo(&amp;x);
    bar(&amp;x);
    return 0;
}</div><footer></footer></article></li></ol></footer></blockquote>

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Andy Wingo (wingo@mastodon.social)'s status on Wednesday, 11-Feb-2026 01:44:32 JSTAndy Wingo
in reply to
- Oriel Jutty :hhHHHAAAH:
- Daniel J. Bernstein
@djb @barubary oh that is funny https://godbolt.org/z/jYc5vjene
In conversationabout 6 months ago from mastodon.socialpermalink
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1. Domain not in remote thumbnail source whitelist: raw.githubusercontent.com
  Compiler Explorer - C (x86-64 gcc 14.2)
  from Matt Godbolt
  void foo(void *x) { int i; if (isnan(*(float *) x)) memcpy(&i,x,4); printf("%x\n",i); } void bar(void *x) { int i; memcpy(&i,x,4); printf("%x\n",i); } int main() { float x = __builtin_nansf(""); foo(&x); bar(&x); return 0; }

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