hugolib: Reset Page's main output on server rebuilds

Not doing so prevents the paginators to be rebuilt on changes.

Fixes #4819

diff --git a/hugolib/site.go b/hugolib/site.go
index 2f47ac23615a1585982577ae0b545d8c9f255f27..273d61901e8eba65ea1a3be1eff56cc722f685c2 100644 (file)
--- a/hugolib/site.go
+++ b/hugolib/site.go
@@ -1604,6 +1604,7 @@ func (s *Site) resetBuildState() {
                p.subSections = Pages{}
                p.parent = nil
                p.scratch = newScratch()
+               p.mainPageOutput = nil
        }
 }