[Qt-creator] Debugger-resistant routine

[Bob Babcock]

Environment:
  Windows XP
  Qt 4.7 beta 2
  Qt Creator 2.0.80 or snapshot from 21-Aug-2010 00:32
  MinGW and GDB

Problem:
A calls B calls C.  When stepping through B with the debugger in Creator, 
the Locals and Watchers window is empty, insert new watch item does 
nothing, and hovering the mouse over variables does not show values in a 
tooltip.  All of these functions work when stepping through A or C, but 
it's B I need to debug.  I don't think B is clobbering anything, if only 
because I insert a breakpoint before it does anything.

Any suggestions?