hugolib: Reset the global pages cache on server rebuilds - hugo - [fork] hugo port for 9front
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       ---
 (DIR) commit 128f14efad90886ffef37c01ac1e20436a732f97
 (DIR) parent 34ee27a78b9e2b5f475d44253ae234067b76cc6e
 (HTM) Author: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
       Date:   Wed, 13 Jun 2018 08:57:26 +0200
       
       hugolib: Reset the global pages cache on server rebuilds
       
       In Hugo 0.42, this could lead to errors of type `runtime error: invalid memory address or nil pointer dereference` in some rare situations.
       
       Note that this was also an issue before 0.42, but the symptom was then potentially stale list content on rebuilds on content changes.
       
       This commit also improves the above error message.
       
       Fixes #4845
       
       Diffstat:
         M hugolib/page_output.go              |       3 +++
         M hugolib/site.go                     |       2 ++
       
       2 files changed, 5 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/hugolib/page_output.go b/hugolib/page_output.go
       @@ -141,6 +141,9 @@ func (p *PageOutput) Render(layout ...string) template.HTML {
        }
        
        func (p *Page) Render(layout ...string) template.HTML {
       +        if p.mainPageOutput == nil {
       +                panic(fmt.Sprintf("programming error: no mainPageOutput for %q", p.Path()))
       +        }
                return p.mainPageOutput.Render(layout...)
        }
        
 (DIR) diff --git a/hugolib/site.go b/hugolib/site.go
       @@ -1492,6 +1492,8 @@ func (s *Site) resetBuildState() {
        
                s.expiredCount = 0
        
       +        spc = newPageCache()
       +
                for _, p := range s.rawAllPages {
                        p.subSections = Pages{}
                        p.parent = nil