Can't debug mingw compiled program

[Vitaly Lipatov]

During program debugging I have some trouble with winedbg use.

Simple test program with error on write access to constant:

#include <string.h>
int main(int argc, char **argv)
{
        char * str = "test";
        _strupr(str);
        return (0);
}

I try debug it:

$ winedbg 3.exe
Can't attach process 3: error 87
WineDbg starting on pid 0xa
In 32 bit mode.
Wine-dbg>c
First chance exception: page fault on write access to 0x00404000 in 32-bit code (0x00935d20).
...
Backtrace:
=>1 0x00935d20 _memccpy+0x595 in msvcrt (0x0090fec8)
  2 0x00401330wine-kthread: stabs.c:246: stabs_find_ref: Assertion `filenr <= cu_include_stk_idx' failed.

I see some bug in stubs handling.
Versions:
i386-mingw32msvc-gcc-3.3.3
wine from last CVS

Any suggestions?