Swift crash "EXC_BREAKPOINT 0x0000000... "
<p>I do have three different crashes in my iOS app; different code locations, but all three with "exc_breakpoint 0x000000...". I cannot reproduce them, they happen on different devices and different iOS versions.</p>

<p>As mentioned, I cannot reproduce them, none of our testers had a crash like that, but according to crashlytics they happen too often to ignore.</p>

<p><strong>Above all I'm generally interested in what this <code>EXC_BREAKPOINT 0x0000...</code> means, e.g. unwrapping nil-optional, cast error, ...</strong></p>

<p>first one:</p>

<p><a href="https://i.stack.imgur.com/BXwgD.png"><img src="https://i.stack.imgur.com/BXwgD.png" alt="enter image description here"></a></p>

<p>second one:
<a href="https://i.stack.imgur.com/9F97V.png"><img src="https://i.stack.imgur.com/9F97V.png" alt="enter image description here"></a></p>

<p>third one:
<a href="https://i.stack.imgur.com/h0Mnz.png"><img src="https://i.stack.imgur.com/h0Mnz.png" alt="enter image description here"></a></p>