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question on gdb


Hi,
recently, after some change in the source, the octave 
development branch started to SIGSEV on exit. 
The strange issue is that this happen only
for cygwin and not on the other platforms.
I have not yet found a solution, only a possible workaround
removing some specific C++ "free" actions, so to fallback to
libstdc++ cleaning activity.

My question however is about the gdb backtrace, is the 
"Cannot access memory at address 0x1a" at # 9 normal ?
Unfortunately I am not really an expert on gdb:

Here the gdb session
----------------------------------------------
octave:1> exit


Program received signal SIGSEGV, Segmentation fault.
0x20f414d0 in ?? ()
(gdb) backtrace
#0  0x20f414d0 in ?? ()
#1  0x6112e117 in __call_exitprocs () from /usr/bin/cygwin1.dll
#2  0x6110b6da in exit () from /usr/bin/cygwin1.dll
#3  0x61004e5a in cygwin_exit () from /usr/bin/cygwin1.dll
#4  0x610b6838 in _sigfe () from /usr/bin/cygwin1.dll
#5  0x0022bba8 in ?? ()
#6  0x6c4e401e in cygstdc++-6!_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc ()
   from /usr/bin/cygstdc++-6.dll
#7  0x6e5c8c65 in _fu4930___ZSt4cerr () at ../../octave_clone/src/toplev.cc:625
#8  0x6e58fd9c in _fu4441___ZN8file_ops14static_members8instanceE ()
    at ../../octave_clone/src/octave.cc:876
#9  0x00401167 in main (argc=Cannot access memory at address 0x1a
) at ../../octave_clone/src/main.c:35
(gdb)
-------------------------------------------

Thanks
Marco






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