Remove the comp-op property?
We have a
comp-op property which is used to set the Cairo compositing operator. However, I can't find it in the SVG 1.1 or 2.0 draft specs, nor in the SVG test suite. Currently we set it to SrcOver by default.
The NEWS file says:
Version 2.18.0 - Support for some of the SVG 1.2 comp-op properties
... but SVG 1.2 didn't really happen AFAIK; maybe
comp-op was removed for the SVG 2 draft?