Created attachment 33380 [details]
Backtrace from gThumb using libopenraw

Hello,
I got this bug reported by a Debian user. libopenraw segfaults with .orf images. I tried with the user-supplied one [1], and one taken from an online website [2], and both make libopenraw segfault, with similar backtraces.

See below, backtrace from gthumb (attached).

However, compiling the examples in the source directory (ccfa.c and thumbc.c), with the image given in the Debian bugreport I get:

$ ./ccfa ~/p1080081.orf
data size = 9619532
data type = 5
$ ./thumbc ~/p1080081.orf
registering type 1
registering type 3
registering type 5
registering type 7
registering type 6
registering type 8
registering type 2
registering type 9
registering type 4
factory size 9
requested size 160
_enumThumbnailSizes init
_enumThumbnailSizes()
_locateDirs()
Identified ORF file
push offset =0x8
numEntries =21 shifting 254bytes
# dir found = 1
num of dirs 1
IFDDir::load() m_offset =8
_locateThumbnail
subtype 0
IFDDir::load() m_offset =8
no size found
error 5

While, with the image from [2], I get:

$ ./ccfa ~/300mm_f5.6.ORF 
data size = 12857600           
data type = 5                  
$ ./thumbc ~/300mm_f5.6.ORF 
registering type 1               
registering type 3               
registering type 5
registering type 7
registering type 6
registering type 8
registering type 2
registering type 9
registering type 4
factory size 9
requested size 160
_enumThumbnailSizes init
_enumThumbnailSizes()
_locateDirs()
Identified ORF file
push offset =0x8
numEntries =21 shifting 254bytes
push offset =0x680
numEntries =6 shifting 74bytes
# dir found = 2
num of dirs 2
IFDDir::load() m_offset =8
_locateThumbnail
subtype 0
IFDDir::load() m_offset =8
IFDDir::load() m_offset =680
_locateThumbnail
subtype 0
looking for JPEG at 13024
JPEG dimensions x=160 y=120
Found 160 pixels
_enumThumbnailSizes failed
current iter is 160
size 160 found
allocate s=11074 data =0
 data =0x9e8e130
Thumbnail in JPEG format, thumb size is 160, 120
short write
output 11074 bytes in 'thumb.jpg'
$

I'm going to see whether this could be a gThumb bug, but the backtrace starting from openraw makes me suspicious about that :) (even if, as I said in the Debian bugreport, gThumb 2.10.* used libopenraw too...)

Kindly,
David

[1] see the full buglog: http://bugs.debian.org/569788
[2] http://raw.fotosite.pl/download-Olympus_E-330_Sigma_135-400_f4.5-5.6/300mm_f5.6.ORF