Fail to parse an icc Lab profile

[calixteman]

I found this profile in a pdf and qcms fails to parse it.
245R.icc.zip

From the pdf itself there is an alternate:

[jrmuizel]

This is failing because it's a Lab profile and those aren't supported.

[calixteman]

We've this bug too in bugzilla:
https://bugzilla.mozilla.org/show_bug.cgi?id=1717767

Do you have some plans to support such profiles ?

[jrmuizel]

No immediate plans. I don't think such profiles are used in web images.

I don't think it would be to hard to add support though. Basically we'd add a ModularTransform for lab_to_xyz in chain.rs that looked like: STAGE(lab_to_xyz, NoCtx) { and then just glue things together.