[sane-devel] Segfault with Lide210

[Uli Fouquet]

Hi there,

stef wrote:
> Le vendredi 23 septembre 2011 14:40:26, vous avez écrit :
> > Hi Stef,
> > 
> > thanks again for the response!
> > 
> > Here is the gdb output, hope that it helps:
> > 
> > uli at pu:~/build/sane-1.0.22/sane-backends$
> > gdb ./frontend/.libs/scanimage
> > GNU gdb 6.8-debian
> > Copyright (C) 2008 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later
> > <http://gnu.org/licenses/gpl.html>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law.  Type "show
> > copying"
> > and "show warranty" for details.
> > This GDB was configured as "i486-linux-gnu"...
> > (gdb) r -v --resolution 75 -l 10 -t 10 -x 100 -y 100 --format=tiff >
> > myimage.tiff
> > Starting
> > program: /home/uli/build/sane-1.0.22/sane-backends/frontend/.libs/scanimage
> > -v --resolution 75 -l 10 -t 10 -x 100 -y 100 --format=tiff > myimage.tiff
> > [Thread debugging using libthread_db enabled]
> > Error while reading shared library symbols:
> > Cannot find new threads: generic error
> > Cannot find new threads: generic error
> > (gdb) c
> > Continuing.
> > [New Thread 0xb74b66b0 (LWP 16190)]
> > scanimage: scanning image of size 292x295 pixels at 8 bits/pixel
> > scanimage: acquiring gray frame
> > scanimage: min/max graylevel value = 24/255
> > scanimage: read 86140 bytes in total
> > 
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 0xb74b66b0 (LWP 16190)]
> > 0xb761636d in fclose@@GLIBC_2.1 () from /lib/tls/i686/cmov/libc.so.6
> > (gdb) bt
> > #0  0xb761636d in fclose@@GLIBC_2.1 () from /lib/tls/i686/cmov/libc.so.6
> > #1  0xb6dfee31 in sane_genesys_cancel (handle=0x8080840) at \
> >                                                    genesys.c:7906
> > #2  0xb7794ddf in sane_dll_cancel (handle=0x80812e0) at dll.c:1283
> > #3  0xb778323d in sane_cancel (h=0x80812e0) at dll-s.c:72
> > #4  0x0804d0a3 in main (argc=13, argv=0xbfd22b14) at scanimage.c:2350
> > (gdb) f 1
> > #1  0xb6dfee31 in sane_genesys_cancel (handle=0x8080840) at
> > genesys.c:7906
> > 7906	      fclose(s->dev->binary);
> > (gdb) l
> > 7901	  DBG (DBG_proc, "sane_cancel: start\n");
> > 7902
> > 7903	  /* end binary logging if needed */
> > 7904	  if (s->dev->binary!=NULL)
> > 7905	    {
> > 7906	      fclose(s->dev->binary);
> > 7907	      s->dev->binary=NULL;
> > 7908	    }
> > 7909
> > 7910	  s->scanning = SANE_FALSE;
> > (gdb)
> > 
> > Somehow the 'binary' seems not to be closable.
> > 
> > Best regards,
> 
> 	Hello,
> 
> 	this variable is never initialized, could you try after applying and 
> compiling this inlined patch ?

Tried it, but meanwhile the scanner seems to be broken completely. While
sane-find-scanners still lists it, scanimage -L cannot find it and I get
no output at all.

I also tried in a virtual machine with Windows and native drivers, but
no response from the device. That really looks like a hardware problem
to me.

Looks also like I wasted your time, sorry for that! I'll try to find a
Windows box tomorrow and will check scanner status there. Afterwards
I'll have some serious words with my dealer and will check back when
everything works again. The few scans I could do were really cool, so
thanks for the good work!

-- 
Uli

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