When building the site with npm run build I get:
TimeoutOverflowWarning: 4294967296000 does not fit into a 32-bit signed integer.
Timer duration was truncated to 2147483647.
I'm on Node.js 12.8.1 on Windows 10 64-bit but it happens on Travis too. It's just not shown because currently the build script is inside tap. You can see it on my fork though https://travis-ci.org/XhmikosR/nodejs.org/builds/574910707#L216
IMO we should run npm run build in an npm script and not inside tap.