Merged from: https://bugs.launchpad.net/inkscape/+bug/195320 #### Steps to reproduce: - open Inkscape * create a star * open filter effects dialog * create a new filter * add an Image filter primitive * select the star * click on "Selected SVG Element" * apply the filter to the star #### What happened? inkscape freezes #### Inkscape Version and Operating System: - Inkscape Version: 1.0alpha (1:0.92.0+devel+201904142205+c3e0287) - Operating System: Ubuntu - Operating System version: 18.10 > **Mc (mc...) wrote on 2016-03-14:** > >This introduce a loops in the rendering since it's the filtered object that's used to filter the object. > svg are not allowed to have any kind of loops, which should just stop the rendering. > >If someone wants to tackle this, the proper fix for that kind of things would probably be to systematically use a derived class of URIReference for all linking "url()" attributes used in styles (URIReference is used by linked xlink:href and checks for loops ). >**Mc (mc...) wrote on 2016-07-21:** > >The recursion is forbidden by spec. All the code needed for it (to check for any causal loop) is in the URIReference::accept code, so as mentioned in comment inbox#8, one just has to derive it to be used not only in xlink:herf refs, but also in url() ones, which will probably require some changes in style.cpp