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'ntdll.DbgUserBreakPoint' during debug startup

 

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Q:

Whenever I start a program from the IDE with debugging enabled, the CPU window pops up and it reports something like ntdll.DbgUserBreakPoint - but I do not have any breakpoints set in my project.

A:

This is debug code in NTDLL.DLL itself. It gets executed if you have more than 16 colors for the application icon. You can help yourself by changing the number of colors for icons (Control Panel, Display Properties).

Microsoft must have hard-coded a debug breakpoint (int 3) in ntdll.dll to trace a bug and then they forgot to take it out for final build of Windows NT.
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