error calling index: index of untyped nil

[appernetic]

Hi, I get this error when I use the files from the example folder:
hugo server -D
Started building sites ...
ERROR 2017/08/14 03:01:42 Error while rendering "page": template: theme/_default/single.html:1:3: executing "theme/_default/single.html" at <partial "structure/h...>: error calling partial: template: theme/partials/structure/head.html:12:7: executing "theme/partials/structure/head.html" at <partial "amp/header"...>: error calling partial: template: theme/partials/amp/header.html:4:16: executing "theme/partials/amp/header.html" at <index (index $.Site....>: error calling index: index of untyped nil

I am using Hugo version v0.20.7 darwin/amd64 BuildDate: 2017-05-17T00:59:06+02:00

[wildhaber]

@appernetic thanks for the message. I'll try to reproduce and looking for a fix.

[wildhaber]

Unfortunately I cannot reproduce this error on v0.26.

But we might could help you if you could debug the variables you get in the following file:

File: themes/gohugo-amp/layouts/partials/amp/header.html:L4

Replace line 3-9:

    {{- range $.Site.Params.ampElements -}}
        {{ $.Site.Params | jsonify }}
        {{ $.Site.Data | jsonify }}
        {{- if (index (index $.Site.Data "amp-modules") .) -}}
            <script async custom-element="{{ . }}" src="{{ (index (index $.Site.Data "amp-modules") .) }}"></script>
        {{- end }}
    {{- end }}

With:

    {{- range $.Site.Params.ampElements -}}
        Context: {{ . | jsonify }}
        Site Params: {{ $.Site.Params | jsonify }}
        Amp-Modules: {{ ($.Site.Data "amp-modules") | jsonify }}
        {{- if (index (index $.Site.Data "amp-modules") .) -}}
            <script async custom-element="{{ . }}" src="{{ (index (index $.Site.Data "amp-modules") .) }}"></script>
        {{- end }}
    {{- end }}