Make sure page-loader doesn't throw errors when registering. (#2282)
Make sure page-loader doesn't throw errors when registering. (#2282)

Even if it does it, we need to mark it as a page error.
BlancheXu/test,zeit/next.js,BlancheXu/test,flybayer/next.js,giacomorebonato/next.js,azukaru/next.js,JeromeFitz/next.js,JeromeFitz/next.js,flybayer/next.js,azukaru/next.js,nelak/next.js,zeit/next.js,kpdecker/next.js,flybayer/next.js,JeromeFitz/next.js,azukaru/next.js,callumlocke/next.js,BlancheXu/test,flybayer/next.js,arunoda/next.js,azukaru/next.js,JeromeFitz/next.js,zeit/next.js