After hhvm upgrade to 3.26 no site index

Hi,

I’ve got a problem with my installation. This morning I had a working installation, with nginx 1.13.12 and hhvm 3.25. Then I upgraded hhvm to 3.26.0 and got an error on index.php of my site.
Specific hhvm error.log line is as follows:
\nFatal error: Uncaught Error: missing case in statement.\n - pos: File "/usr/share/nginx/html/wp-includes/template-loader.php", line 47, characters 1-1:\n - unexpected: ''\n - kind: missing\n in /usr/share/nginx/html/wp-includes/template-loader.php:1\nStack trace:\n#0 /usr/share/nginx/html/wp-blog-header.php(19): include()\n#1 /usr/share/nginx/html/index.php(17): include()\n#2 {main}

I’ve checked my environment, hhvm does work. In fact wp-admin pages work as designed, I can login and make changes to site. Even make new pages or posts, problem is that nothing is showing.

Can anyone help?