On Thu, 8 Sep 2011, Kai-Uwe Behrmann wrote:

> Am 08.09.11, 21:31 +0200 schrieb Nicolas Chauvet:
>> I forward to the lcms-users mailing list this case:
>> https://bugzilla.redhat.com/show_bug.cgi?id=607758
>
> The profile is damaged at
> https://bugzilla.redhat.com/attachment.cgi?id=489871
>
> ICC Examin says the last two tags, gTRC + bTRC, are zero and gets warnings
> from lcms2. So I guess the user of lcms, UFRAW, has to handle the damaged
> profile and/or not obtaining a transform.

Interesting.  However, based on the long bug history, I suspect that
there are multiple bugs in ufraw.  One of them is almost certainly
related to threading since any description of needing to try several
times before it worked sounds like a threading issue.

For an application using OpenMP to thread an algorithm, a simple way
to see if an issue is related to threading is to set this environment
variable in the environment before starting the application:

   export OMP_NUM_THREADS=1

If it then works consistently reliably, then the problem is due to
threading.

Someone should fix this dire issue:

"The submitted transforms array which contains the NULL transform is
created a stack frame above, in cmsCreateMultiprofileTransform(). The
function cmsCreateTransform() is called in some places without
checking its result (i.e. that it doesn't return NULL) which is then
put in the array."

Bob
--
Bob Friesenhahn
bfriesen@simp..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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