I had the same crash problem, and found this in the upstream bug tracker: https://github.com/lwindolf/liferea/issues/258
>From that report: "It worked with GTK+ 3.16 and no longer does with GTK+ 3.18, not sure why. Adding liststore6 to the requested objects "fixes" it." These commits to upstream are said to fix this problem, but I haven't tested it myself yet: https://github.com/lwindolf/liferea/pull/267/commits
