crashes after click on the scan symbol

[Randy-andy-]

since about two month, simple scan crashes immediately after pushing the scan button symbol.
In earlier times it worked well, but I update my system very often.
If I use diffent scan tools, like scangui, from the kipi-plugins or XSane, everthing works fine, but I like to use simple-scan more often than the others.

The curious thing: If I start simple-scan using strace, it works well - why?

If I start logging simple-scan with the help of the debug mode the last entries before crashing are these:

[+3,43s] DEBUG: scanner.vala:884: sane_get_option_descriptor (45)
[+3,43s] DEBUG: scanner.vala:895: SCAN_SOURCE not available, trying alternative "doc-source"
[+3,43s] DEBUG: scanner.vala:546: sane_control_option (2, SANE_ACTION_SET_VALUE, "Gray") -> (SANE_STATUS_GOOD, "Gray")
[+3,43s] DEBUG: scanner.vala:462: sane_control_option (5, SANE_ACTION_SET_VALUE, 150) -> (SANE_STATUS_GOOD, 150)
[+3,43s] DEBUG: scanner.vala:462: sane_control_option (3, SANE_ACTION_SET_VALUE, 2) -> (SANE_STATUS_GOOD, 8)
[+3,43s] DEBUG: scanner.vala:530: sane_control_option (10, SANE_ACTION_SET_VALUE, option.range.max) -> (SANE_STATUS_GOOD)
[+3,43s] DEBUG: scanner.vala:530: sane_control_option (11, SANE_ACTION_SET_VALUE, option.range.max) -> (SANE_STATUS_GOOD)
[+3,45s] DEBUG: scanner.vala:1209: sane_start (page=0, pass=0) -> SANE_STATUS_GOOD
[+3,45s] DEBUG: scanner.vala:1226: sane_get_parameters () -> SANE_STATUS_GOOD
[+3,45s] DEBUG: scanner.vala:1238: Parameters: format=SANE_FRAME_GRAY last_frame=SANE_TRUE bytes_per_line=1269 pixels_per_line=1269 lines=1753 depth=8

If I start simple-scan with strace, so that it works, but log only the output of the debug mode for comparison, I got instead:
Code:

[+4,60s] DEBUG: scanner.vala:884: sane_get_option_descriptor (45)
[+4,60s] DEBUG: scanner.vala:895: SCAN_SOURCE not available, trying alternative "doc-source"
[+4,60s] DEBUG: scanner.vala:546: sane_control_option (2, SANE_ACTION_SET_VALUE, "Gray") -> (SANE_STATUS_GOOD, "Gray")
[+4,60s] DEBUG: scanner.vala:462: sane_control_option (5, SANE_ACTION_SET_VALUE, 150) -> (SANE_STATUS_GOOD, 150)
[+4,60s] DEBUG: scanner.vala:462: sane_control_option (3, SANE_ACTION_SET_VALUE, 2) -> (SANE_STATUS_GOOD, 8)
[+4,60s] DEBUG: scanner.vala:530: sane_control_option (10, SANE_ACTION_SET_VALUE, option.range.max) -> (SANE_STATUS_GOOD)
[+4,60s] DEBUG: scanner.vala:530: sane_control_option (11, SANE_ACTION_SET_VALUE, option.range.max) -> (SANE_STATUS_GOOD)
[+4,61s] DEBUG: scanner.vala:1209: sane_start (page=0, pass=0) -> SANE_STATUS_GOOD
[+4,61s] DEBUG: scanner.vala:1226: sane_get_parameters () -> SANE_STATUS_GOOD
[+4,61s] DEBUG: scanner.vala:1238: Parameters: format=SANE_FRAME_GRAY last_frame=SANE_TRUE bytes_per_line=1269 pixels_per_line=1269 lines=1753 depth=8

here it starts to differ, cause the scanning starts to work:

[+4,62s] DEBUG: simple-scan.vala:254: Page is 1269 pixels wide, 1753 pixels high, 2 bits per pixel
[+4,62s] DEBUG: simple-scan.vala:188: Getting color profile for device plustek:libusb:008:002
[+4,62s] DEBUG: simple-scan.vala:208: Unable to find colord device plustek:libusb:008:002: property match 'Serial'='sane:plustek:libusb:008:002' does not exist
[+4,72s] DEBUG: ui.vala:1739: Saving state to /home/andy/.cache/simple-scan/state
[+18,04s] DEBUG: scanner.vala:1310: sane_read (1270) -> (SANE_STATUS_GOOD, 1270)
[+18,04s] DEBUG: scanner.vala:1310: sane_read (2538) -> (SANE_STATUS_GOOD, 2538)
[+18,04s] DEBUG: scanner.vala:1310: sane_read (2538) -> (SANE_STATUS_GOOD, 2538)

If you are interested in more details, you could read it here:
http://forums.gentoo.org/viewtopic-t-993304-highlight-.html

It would be great if you don't drop my report only cause I'm using a different distro. Hey it's open-source and we all follow the same target, to improve the stability of a great peace of software - right?

Best regards, Andy.