title: malloc: *** error: incorrect checksum for freed object - object was probably modified after being freed
body: <p>I have a big problem with my iOS App: it crashes sometimes without detailed debug error.
  The stack trace is empty. These are the only two lines in the stack trace:</p>
  
  <ol>
  <li>crash start in UIApplicationMain at "symbol stub for: -[_UIHostedTextServiceSession dismissTextServiceAnimated:]".</li>
  <li>and report "libsystem_c.dylib`malloc_error_break".</li>
  </ol>
  
  <p>in <code>com.apple.main-thread</code>.</p>
  
  <p>The error on Xcode debugger (with connected device):</p>
  
  <pre><code>malloc: *** error for object 0x208a7614: incorrect checksum for freed object - object was probably modified after being freed.
  *** set a breakpoint in malloc_error_break to debug
  </code></pre>
  
  <p>I have set a breakpoint in malloc_error_break with libsystem_c.dylib without any feedback from debugger. I have no idea to solve this issue.</p>