Re: Unwanted undo-boundary

[Eli Zaretskii]

>    GNU gdb 5.2.1
>    Copyright 2002 Free Software Foundation, Inc.
>    GDB is free software, covered by the GNU General Public License, and you 
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>    This GDB was configured as
> "i686-pc-mingw32"...c:/cygmnt/prj/pkg/src/gdb/mingw32/gdb/dwarf2read.c:985:
> gdb-internal-error: read_comp_unit_head: dwarf from non elf file
> 
>    An internal GDB error was detected.  This may make further
>    debugging unreliable.  Quit this debugging session? (y or n)

Get a newer port of GDB.  Evidently, the one you have does not support
DWARF-2 debug info on Windows.  You can find GDB 7.0 on the MinGW
site.