[Qt-creator] OS X Debugger (LLDB) Not showing number of items in containers

Michael Jackson imikejackson at gmail.com
Tue Feb 18 04:51:03 CET 2014

 int main(int argc, char *argv[])
  QVector<size_t> dims(1, 3);
  qDebug() << dims[0];  <== Breakpoint here
  return 0;

The above problem reproduces the issue that I am having. I am on OS X 10.8.5 with a self built Qt 4.8.5. I have Xcode 4.6.3 installed. I have set the Debugger to use lldb. When I step through the above program and stop at the line marked above the debugger says that the "dims" variable has "0" items. if I use an expression evaluator for dims[0] it shows "3" which is correct. is this a bug with the LLDB, a limitation of trying this on OS X in general or (most likely) a user error on my part? I have tried changing the debugger in the QtVersions and QtKits preferences. None of that seems to help. I feel like I am back in the dark ages of debugging again.

Any help to get my debugging back on track is most helpful

Mike Jackson
BlueQuartz Software.

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