title: Add a symbolic breakpoint on a selector in Xcode
body: <p>There's a bug in my app which shows up with the following (partial) stacktrace:</p>
  
  <pre><code>2011-11-25 01:55:59.760 Events2[6650:403] -[Event boolValue]: unrecognized selector sent to instance 0x7fb903928670
  </code></pre>
  
  <p>To debug this I decided to add a symbolic breakpoint on -[Event boolValue] reasoning that when that selector is sent, the debugger would halt.</p>
  
  <p>However, nothing happens. After setting the breakpoint the app just soldiers on and generates the same exception without halting.</p>
  
  <p>I have defined the breakpoint as follows:</p>
  
  <p><img src="https://i.stack.imgur.com/MagnJ.png" alt="enter image description here"></p>
  
  <p>I'm using the LLDB debugger with Xcode 4.2</p>