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Date:	Tue, 16 Aug 2011 07:41:09 +0200
From:	Marco atzeri <marco DOT atzeri AT gmail DOT com>
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Subject:	gdb "warning: (Internal error"
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Hi,
I am trying to debug a crash bug in octave, and I am puzzled by the
backtrace output

#0  popen (
     command=0x208195d4 "/usr/bin/gs -dQUIET -dNOPAUSE -dBATCH -dSAFER 
-sDEVICE=png16m -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r150x150 
-dEPSCrop -sOutputFile=gnuplot.png -", in_type=0x9a45add "w")
     at /pub/cygwin/cvs/src_new/winsup/cygwin/syscalls.cc:3919
#1  0x610c7df5 in _sigfe () from /usr/bin/cygwin1.dll
warning: (Internal error: pc 0x23f in read in psymtab, but not in symtab.)
#2  0x00000240 in ?? ()
warning: (Internal error: pc 0x1af in read in psymtab, but not in symtab.)
#3  0x000001b0 in ?? ()
warning: (Internal error: pc 0x1af in read in psymtab, but not in symtab.)
#4  0x2062ea80 in ?? ()
#5  0x684419ef in Fl_Gl_Window::flush (this=0x206c2fd0) at 
Fl_Gl_Window.cxx:347
#6  0x09bf2a0f in flush (this=<optimized out>) at ../FL/x.H:126
#7  Fl::flush () at Fl.cxx:481
#8  0x09bf2caf in Fl::wait (time_to_wait=0) at Fl.cxx:369
#9  0x09bf2d00 in Fl::check () at Fl.cxx:412
#10 0x09a22870 in _fu90___ZTV20base_graphics_object ()
     at ../../octave/src/DLD-FUNCTIONS/__init_fltk__.cc:1775
#11 0x09a41001 in _fu27__octave_NaN ()
     at ../../octave/src/DLD-FUNCTIONS/__init_fltk__.cc:1867
[cut]


#4  0x2062ea80 is surely
20000000-20850000 rw-p 00000000 0000:0000 0                   [heap]
20850000-38000000 ===p 00850000 0000:0000 0                   [heap]


Is it possible that #2,3,4 are red herrings due to gdb internal error , 
or the stack is really corrupted ?

Thanks
Marco

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