Sorry, the info doesn't help. Related code haven't changed for a while, so should be a deeper problem. I remember there was some template fitting issue, but forgot how to fix it. Perhaps I need to setup a VS environment..

//Edit: also I'm not very good at analysing the templates/macros used in the code: https://github.com/steemit/fc/compare/19d41b860676959e2014dd34700209df49eb62c4...a1354c5382ee16a7405a57ad688a891684d85b16#diff-18f79c66780a65dbb617edf936a5dd38R115