(gdb) bt full
#0  ___chkstk ()
    at /cygdrive/i/szsz/tmpp/64gcc/mingw64-x86_64-gcc-4.5.3-6/src/gcc-4.5.3/libgcc/../gcc/config/i386/cygwin.asm:110
No locals.
#1  0x0000000007297f00 in ?? ()
No symbol table info available.
#2  0x0000000000000002 in ?? ()
No symbol table info available.
#3  0x000000000000007a in ?? ()
No symbol table info available.
#4  0x0000000000000000 in ?? ()
No symbol table info available.