Hugo: .Scratch.SetInMap doesn't work in ranges in certain cases

[davidnagli]

I have a bizarre issue that has been driving me nuts for several days 😡, and I'm pretty convinced that either I'm doing something completely stupid, or this is a bug in Hugo or Go itself 🤷‍♂️

Here's an example where I try to set an item in a map from within a loop:

{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
{{ .Scratch.SetInMap "greetings" "French" "Bonjour" }}

{{range $index, $page := .Site.RegularPages}}
  {{ .Scratch.SetInMap "greetings" "russian" "Privet" }}
{{end}}

Greetings: {{.Scratch.Get "greetings"}}

The result I get (notice, no 'Russian' in the map):

Greetings: map[english:Hello french:Bonjour]

To try to work around this, I decided maybe I should try using .Site.Pages instead of .Site.RegularPages.

{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}


{{range $index, $page := .Site.Pages}}
  {{ .Scratch.SetInMap "greetings" "russian" "Privet" }}
{{end}}

Greetings: {{.Scratch.Get "greetings"}}

Sure enough, it works perfectly:

Greetings: map[russian:Privet english:Hello french:Bonjour]

Ok... so now by any normal logic this must mean that that there are 0 regular pages which is the only reason why a loop wouldn't run. So I added an asterisk every time it loops so I can visualize how many times it's running:

{{range $index, $page := .Site.RegularPages}}
  <div>*</div>
  {{ .Scratch.SetInMap "greetings" "russian" "Privet" }}
{{end}}

And I get a row of asterisks indicating that the loop is in fact running:

*
*
*
*
*
*
*

Ok so at this point I'm completely baffled. The loop works perfectly fine, yet whenever I use .Site.RegularPages it completely breaks .Scratch.SetInMap, leaving me to think that this has to be a bug.

Thanks in advance, and thanks for the amazing project 👍

Version Info

Hugo Static Site Generator v0.42.1 darwin/amd64

[davidnagli]

Btw the following would seem to be a perfectly obvious workaround (note the if statement filtering the Kind, but the fact that we're still using .Site.Pages for the iteration):

{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}

{{range $index, $page := .Site.Pages}}
  {{if (eq $page.Kind "page")}}
    {{ .Scratch.SetInMap "greetings" "russian" "Privet" }}
  {{end}}
{{end}}

Greetings: {{.Scratch.Get "greetings"}}

But this doesn't work either...

Greetings: map[english:Hello french:Bonjour]

I'm pretty sure I'm overcomplicating this and it's really just some stupid mistake. If it is, let me know, otherwise I can share the rest of my debug attempts to save you guys some time (saving $page.Kind to a variable etc)

[bep]

Please use https://discourse.gohugo.io/ for questions/troubleshooting. Also see Hugo Documentation.

[davidnagli]

This isn't a question, it's a bug report... I assume legitimate bug reports belong on Github not the discourse forum, unless you guys have some other system in place.

[davidnagli]

Relevant section from the README:

If you believe you have found a defect in Hugo or its documentation, use the GitHub issue tracker to report the problem to the Hugo maintainers. If you're not sure if it's a bug or not, start by asking in the discussion forum. When reporting the issue, please provide the version of Hugo in use (hugo version).

[bep]

Ask your question on the forum and I will show tell how this works. Your code has a logical flaw.