ref: 93e24a03ce98d3212a2d49ad04739141229d0809
parent: e9c7b6205f94a7edac0e0df2cd18d1456cb26a06
author: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
date: Sat Mar 24 05:19:49 EDT 2018
hugolib: Fix freeze in invalid front matter error case Fixes #4526