crash when trying to scan inaccessible files on mounted camera

[Jakob]

I run RPD on Ubuntu 11.04. When I put in a camera and choose RPD, it recognizes the camera but doesn't show any photos.

$ rapid-photo-downloader -d
[INFO/MainProcess] Rapid Photo Downloader 0.4.0
[INFO/MainProcess] Using pyexiv2 0.3.0
[INFO/MainProcess] Using exiv2 0.21.1
[INFO/MainProcess] Using hachoir 1.3.2
[INFO/MainProcess] No downloads have occurred so far today
[INFO/MainProcess] allocating a new mmap of length 4096
[DEBUG/MainProcess] created semlock with handle 3063353344
[DEBUG/MainProcess] created semlock with handle 3063349248
[DEBUG/MainProcess] created semlock with handle 3063345152
[DEBUG/MainProcess] created semlock with handle 3063341056
[DEBUG/MainProcess] created semlock with handle 3063336960
[DEBUG/MainProcess] created semlock with handle 3063332864
[DEBUG/MainProcess] created semlock with handle 3063328768
[DEBUG/MainProcess] created semlock with handle 3063324672
[INFO/GetPreviewImage-1] child process calling self.run()
[DEBUG/MainProcess] Start of day is set to 3:0
[DEBUG/MainProcess] SubfolderFile PID: 20381
[INFO/SubfolderFile-2] child process calling self.run()
[DEBUG/SubfolderFile-2] Finished 0. Getting next task.
[INFO/MainProcess] Detected Canon Digital Camera
[INFO/MainProcess] Detected backup win
[INFO/MainProcess] Detected backup
[INFO/MainProcess] Detected musik
[INFO/MainProcess] Detected win7
[DEBUG/MainProcess] created semlock with handle 3004690432
[DEBUG/MainProcess] created semlock with handle 3004686336
[DEBUG/MainProcess] created semlock with handle 3004682240
[DEBUG/MainProcess] Queue._after_fork()
[DEBUG/MainProcess] created semlock with handle 3004678144
[DEBUG/MainProcess] created semlock with handle 3004674048
[DEBUG/MainProcess] created semlock with handle 3004669952
[DEBUG/MainProcess] created semlock with handle 3004665856
[DEBUG/MainProcess] created semlock with handle 3004661760
[DEBUG/Scan-3] Queue._after_fork()
[INFO/Scan-3] child process calling self.run()
[DEBUG/MainProcess] TaskManager PID: 20383
[INFO/Scan-3] process shutting down
[DEBUG/Scan-3] running all "atexit" finalizers with priority >= 0
[DEBUG/Scan-3] running the remaining "atexit" finalizers
Process Scan-3:
Traceback (most recent call last):
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 159, in run
    size = self._gio_scan(source, 0)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 108, in _gio_scan
    file_size_sum)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 108, in _gio_scan
    file_size_sum)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 133, in _gio_scan
    file_id)
  File "/usr/lib/pymodules/python2.7/rapid/rpdfile.py", line 90, in get_rpdfile
    scan_pid, file_id)
  File "/usr/lib/pymodules/python2.7/rapid/rpdfile.py", line 168, in __init__
    self.unique_id = str(scan_pid) + ":" + file_id
TypeError: cannot concatenate 'str' and 'NoneType' objects
[INFO/Scan-3] process exiting with exitcode 1
[DEBUG/MainProcess] created semlock with handle 3004264448
[DEBUG/MainProcess] created semlock with handle 3004260352
[DEBUG/MainProcess] created semlock with handle 3004256256
[DEBUG/MainProcess] Queue._after_fork()
[DEBUG/MainProcess] created semlock with handle 3004252160
[DEBUG/MainProcess] created semlock with handle 3004248064
[DEBUG/MainProcess] created semlock with handle 3004243968
[DEBUG/MainProcess] created semlock with handle 3004239872
[DEBUG/MainProcess] created semlock with handle 3004235776
[DEBUG/MainProcess] TaskManager PID: 20386
[DEBUG/Scan-4] Queue._after_fork()
[DEBUG/Scan-4] Queue._after_fork()
[INFO/Scan-4] child process calling self.run()
[INFO/Scan-4] process shutting down
[DEBUG/Scan-4] running all "atexit" finalizers with priority >= 0
[DEBUG/Scan-4] running the remaining "atexit" finalizers
Process Scan-4:
Traceback (most recent call last):
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 159, in run
    size = self._gio_scan(source, 0)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 108, in _gio_scan
    file_size_sum)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 108, in _gio_scan
    file_size_sum)
  File "/usr/lib/pymodules/python2.7/rapid/scan.py", line 133, in _gio_scan
    file_id)
  File "/usr/lib/pymodules/python2.7/rapid/rpdfile.py", line 90, in get_rpdfile
    scan_pid, file_id)
  File "/usr/lib/pymodules/python2.7/rapid/rpdfile.py", line 168, in __init__
    self.unique_id = str(scan_pid) + ":" + file_id
TypeError: cannot concatenate 'str' and 'NoneType' objects
[INFO/Scan-4] process exiting with exitcode 1

[Damon Lynch (dlynch3)]

Thanks for your bug report. I'll need to change the code to account for cases where the program can see the camera is mounted, but is denied access to any of the files on it (which is what is happening).

Meanwhile, I am asking the Gnome developers why access to the files is denied.

If you want to use Rapid Photo Downloader, the best workaround will be to use a card reader.