- thread-safe init and stack trace output (more robust)
- better symbol display (no longer suppress all STL; UDT line splitting
- add debug_wprintf and debug_disable_leak_reporting
- exception handler now called from __try and vectored chain (if
supported by OS); will even work while being debugged and isn't stomped
on by some other UnhandledExceptionFilter users
This was SVN commit r2419.