tpl: Must do a extra lookup of cloned base templates

See #2549
Fixes #3013

diff --git a/tpl/template.go b/tpl/template.go
index 1c71989f47193b89144186847b91b55f5291c373..9efb8869ac09cff6bec599ae4cc4e89e4352d4b6 100644 (file)
--- a/tpl/template.go
+++ b/tpl/template.go
@@ -109,6 +109,10 @@ func (*TemplateProvider) Clone(d *deps.Deps) error {
 
        for k, v := range t.overlays {
                vc := template.Must(v.Clone())
+               // The extra lookup is a workaround, see
+               // * https://github.com/golang/go/issues/16101
+               // * https://github.com/spf13/hugo/issues/2549
+               vc = vc.Lookup(vc.Name())
                vc.Funcs(tmpl.funcster.funcMap)
                tmpl.overlays[k] = vc
        }