Bug#785529: Gamera not reproducible

[Daniel Stender]

More info on current Gamera isn't reproducible due to differences
in an image of the docs.

$ md5sum b1/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png \
         b2/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png
2c3246eb89a49394c01ca8256a26c208  
b1/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png
f77ceccff2d380ab8dff37ed900809d7  
b2/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png

The Jenkins testing does not trigger this problem for some reason (marked as 
being reproducible),
but it's there:

$ diff b1/gamera_3.4.2+svn1437-1_amd64.changes 
b2/gamera_3.4.2+svn1437-1_amd64.changes | grep gamera-doc
<  c62063b2972898e9a873634a1440d409d93a85e4 2747414 
gamera-doc_3.4.2+svn1437-1_all.deb
>  a52df609f3ff464a2a1159895878ca26129e5b17 2747486 
> gamera-doc_3.4.2+svn1437-1_all.deb

The differences are coming into light when the images are getting compared
via sng. The result of
$ diffoscope --text djvu_threshold_plugin_00.png.diff \
  b1/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png \
  b2/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png
is attached.

There is a non-determinism in djvu_threshold which needs a deeper investigation.
Any hints very welcome!

DS

-- 
4096R/DF5182C8
46CB 1CA8 9EA3 B743 7676 1DB9 15E0 9AF4 DF51 82C8
LPI certified Linux admin (LPI000329859 64mz6f7kt4)
http://www.danielstender.com/blog/


--- b1/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png
+++ b2/usr/share/doc/gamera-doc/html/images/djvu_threshold_plugin_00.png
├── sng
│ @@ -80,60 +80,60 @@
│  3e0000000000003ffffe0ffc01fffffff03fffc07ffc03f01ff07ffff0
│  fc0000000000000ffffc0f7807fffffffc7fff00ffffe7f01c007ffff0
│  fc00000000000003fff80f300ffffffffffffc00fffffff000007ffff0
│  fc00000000000001fff00e301ffffffffffe0000fff9fff000007ffff0
│  fc000000000000001f801e003ffbfffff80000007ff87fe000000ffff0
│  fc0000000000000000001e007ff7ffc00000000003c01fe0000000fff0
│  f80000000000000000001c01ffeffc0000000000000007c00000007ff0
│ -f80000000000000000003c03ffdfe00000000000000002000000003ff0
│ +f80000000000000000003c03ffdfe00000000000000002000000007ff0
│  f80000000000000000003807ffff200001fe0000000000000000003ff0
│  fc000000200000001000381fffffc0001fff0000000000000000001ff0
│  f8000000000000000100703fffba80001fff007ff80000000000001ff0
│ -f800000000000000010060ffc0c000400fff00ffffc000000000000ff0
│ +f800000000000000010060ffc0c000400fff00ffffc000000000001ff0
│  fc00000000000000000041ff000017fc0ffe00fffff000000000000ff0
│  7c00000000000000020003fc0003f0ffcffc001ffffe00000000000ff0
│  3c00000000000020000007e0003fe0fffff0000ffffe00000000000ff0
│  3c0000000000000000001f8001ff807fffe0000fffff00000000000ff0
│  1c00000000000000000010000fff007fffc000ffe3ff00000000000ff0
│  0e00000000000000000000007ffe007fff8003ffc0fe00000000000ff0
│  0e0000000000000000010003fffe007fff0007ffc01c00000000000ff0
│  06000000000000000003001ffffe007ffe003fffe00000000000000ff0
│  0300000000000000000600fffffe007ffc007fffe00000000000000ff0
│ -0000000000000000000403fff0fe007ff801fffff80000000000000ff0
│ +0000000000000000000403fff0fe007ff801fffff80000000000001ff0
│  000000000000000000001ffff0fe007fe003fffffc0000000000001ff0
│  000000000000000000001ffff0fe007f8007ffffff0000000000001ff0
│  0000000000000000000000fff9fe00fe000000ffff8000000000001ff0
│ -00000000000000000000ff7ffffe00f80000007fffe000000000001ff0
│ +00000000000000000000ff7ffffe00f80000007fffe000000000003ff0
│  00000000000000000007fffffffe01e00000001fffe000000000003ff0
│  0000000000000000000ffff7fffe03800000000fffc000000000003ff0
│  00000000000000000000fffffffe030000000007ff8000000000003ff0
│ -00020000000000000001fffffffc000000000003fe0000000000003ff0
│ -000f00000000000000001ffffffc000000000003f80000000000007ff0
│ -020fc00000000000038007fffff8000000000001f00000000000407ff0
│ -03cfe0000000000007800033fff0000000000000e00000000000407ff0
│ +00020000000000000001fffffffc000000000003fe0000000000007ff0
│ +000f00000000000000001ffffffc000000000003f80000000000407ff0
│ +020fc00000000000038007fffff8000000000001f0000000000040fff0
│ +03cfe0000000000007800033fff0000000000000e0000000000040fff0
│  03fff800000000007fc000003fe0000000000000c00000000000c0fff0
│ -03fffe0000000007ffe000001fc0000000000000000000000000c0fff0
│ +03fffe0000000007ffe000001fc0000000000000000000000000c1fff0
│  f3fffe000000007ffff800003f00003c00000000004000000000c1fff0
│  f9fe0000000007fffffe0000f80000ff0000000001e000000000c3fff0
│ -f00000000003ffffffffc01f800003ffc00000003fe00000000003fff0
│ +f00000000003ffffffffc01f800003ffc00000003fe00000000007fff0
│  00000000fffffffffffffe00000007ffe00000003fe00000000007fff0
│ -0000001ffffffffffffff000000007fff80000003fe0000000008ffff0
│ +0000001ffffffffffffff000000007fff80000003fe000000000cffff0
│  000000fffffffff3ffffa000000003fffc0000003ff000000001fffff0
│  000000ffffffffeffffe2000000001ffff000000fff000000001fffff0
│  00000001ffffffff8e360000000001ffffc00003fff800000001fffff0
│ -00000000000ff18000c00000000001fffff0001ffffc00000003fffff0
│ +00000000000ff18000c00000000001fffff0001ffffc00000007fffff0
│  0000000000000000000000001ffff1fffffe00fffffc0000001ffffff0
│  000000000000000000000003ffffffffffffffffffff000000fffffff0
│ -00000000000000000000003fffffffffffffffffffffe00003fffffff0
│ +00000000000000000000003fffffffffffffffffffffe00007fffffff0
│  80000000000000000001fffffffffffffffffffffffffc000ffffffff0
│  fe000000000000003ffffffffffffffffffffffffffffff83ffffffff0
│  fffe0000000001fffffffffffffffffffffffffffffffffffffffffff0
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffffe0
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffffe0
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffffc0
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffffc0
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffff80
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffff80
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00
│ -ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│ +fffffffffffffffffffffffffffffffffffffffffffffffffffffffff0
│  }
╵