Softproof w/ perceptual intent moves all pixels to zero

[beku]

(moved from SF Milan Knizek)

When the perceptual intent in menu /View/Intent is chosen, then Watch Colors 3D plugin (ICC Examin) shows that all image pixels move to zero of LAB space instead of to the boundaries of the proof colour space. When relative colorimetric is chosen, Watch Colors 3D works as expected.

The problem can be reproduced on Arch Linux (x86_64) and only with Czech locale. When LANG=C is set, the icc_examin_cp plugin crashes and GUI disappears instead.

Steps to reproduce:
0. Set LANG="cs_CZ.UTF-8" (check locale -a to see if it exists).

1. Open image in CinéPaint, activate color management (with or without Oyranos), choose some soft proof profile.
2. Set Perceptual as intent
3. Open Watch colors 3D plugin (image pixels are shown as spots)
4. Choose /View/Proof Display -> all spots move to zero point of LAB.

The attached image illustrates the matter.

Oyranos, CinéPaint, ICC Examin are compiled from GIT using the build scripts on www.oyranos.org.
When the programs are compiled on Ubuntu 12.04 LTS, the bug does not appear.

Attached is valgrind output for the Czech locale. (i.e. no crash) and for LANG=C as well.

Anything else to help with debugging?

See attachements on http://sourceforge.net/p/oyranos/bugs/41/