I'm working with some Ordnance Survey data, specifically the VectorMap Local (in GML format, October 2018) set and attempting to style the layers using the very handy OS provided stylesheets (here: OS Github Repo link). All the layers render, except for those for which the stylesheets are using rule-based symbology, so this seems to be the source of the trouble. This means that
Line.qml all work fine (see repo link above) and that
RoadCLine.qml fail to render anything, just white blank canvas.
I've ruled out the obvious candidates. The rule works, or at least testing the rule indicates that it is finding the right features:
I've confirmed that both layer and the whole project are both using the same and right CRS (27700). There aren't any scale related issues (as the screenshot indicates, max/min aren't on very many features, including the one I'm testing). The same layer renders styling Categorised styling using the same column without any issues.
I’ve also tried working off previous commits in GitHub (master, 24 Oct 2018, 12 Feb 2018, 26 Sep 2016) and with other style sets within each of those branches (e.g. “Geopackage stylesheets”), which fails less surprisingly.
Sample data (Vector GML format in my case,
os-vectormap-local-gml-sample-data.zip) can be downloaded here: enter link description here