Note that this only appears to be affecting the views output on the frontend. Types and Views appear as normal in wp-admin. I've tried disabling all other themes/plugins which had no effect, I'm positive this is a compatibility issue between Views & HHVM.
Thank you for reporting on this. I have just discussed with Views Developers and they suspect that, there are chances of such incompatibility. Since HHVM requires some coding standards which may lead to several serious changes in Views code.
However, I have submitted this for a consideration and future improvements - to the Dev Team. But unfortunately this won't be updated anytime soon.
Thanks for acknowledging the issue Waqas. I understand it's not an easy fix to patch incompatibilities with HHVM. If you could encourage your developers to take a look at the HHVM github (hidden link) and maybe post an issue there with the specific functions that are not working as intended in HHVM environment the community team there might be able to implement a solution into HHVM.
With many popular Hosts picking up and encouraging HHVM such as WPEngine, Siteground, Pagely, Kinsta and Dreamhost I'd say it's an important step for WP-Types to actively pursue compatibility.
On my own WordPress sites that I've tested HHVM with I'm seeing on average about a 30-40% reduction in load times which is awesome.
Please keep me and the community posted as you tackle this issue.