Version 2.88.0 does not compile..

[rsyncOSX]

Describe the bug
I updated my blog and it does not compile. I even tried creating a new site blowfish-tool and the newly created site by the tool throws the same errord..

A clear and concise description of what the bug is.

`Watching for changes in /Users/thomas/Downloads/mynewsite/{archetypes,assets,content,data,i18n,layouts,static,themes}
Watching for config changes in /Users/thomas/Downloads/mynewsite/hugo.toml, /Users/thomas/Downloads/mynewsite/config/_default, /Users/thomas/Downloads/mynewsite/themes/blowfish/config.toml, /Users/thomas/Downloads/mynewsite/themes/blowfish/config/_default
Start building sites …
hugo v0.148.0+extended+withdeploy darwin/arm64 BuildDate=2025-07-08T13:34:49Z VendorInfo=brew

ERROR render of "/" failed: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: index.html:12:6: executing "index.html" at <partial "head.html" .>: error calling partial: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name
ERROR render of "/tags" failed: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: _default/terms.html:12:6: executing "_default/terms.html" at <partial "head.html" .>: error calling partial: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name
ERROR render of "/404" failed: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: 404.html:12:6: executing "404.html" at <partial "head.html" .>: error calling partial: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name
ERROR render of "/categories" failed: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: _default/terms.html:12:6: executing "_default/terms.html" at <partial "head.html" .>: error calling partial: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name
Built in 7 ms
Error: error building site: render: failed to render pages: render of "/authors" failed: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: _default/terms.html:12:6: executing "_default/terms.html" at <partial "head.html" .>: error calling partial: "/Users/thomas/Downloads/mynewsite/themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name`

To Reproduce
Steps to reproduce the behavior:

Try create a new site with blowfish-tools.

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS] macOS 15.5 (including latest updates)
• Browser [e.g. chrome, safari] Safari
• Version [e.g. 22]

Hugo & Blowfish versions
Which version of Hugo and Blowfish are you using?

hugo v0.148.0+extended+withdeploy darwin/arm64 BuildDate=2025-07-08T13:34:49Z VendorInfo=brew
Blowfish version 2.88.0

Additional context
Add any other context about the problem here.

[servedsmart]

The issue seems to be here:

blowfish/layouts/partials/head.html

Line 78 in f806c36

{{ if or $disableImageOptimization (strings.HasSuffix .Name ".svg") }}

The following error suggests that $backgroundAndFeaturedImages[index].Name might be null in some cases (I know that how I wrote this is incorrect, I just wanted to make sure that I refer to a single image, not the array/slice):

 at <.Name>: nil pointer evaluating interface {}.Name

I tested this change quite extensively with my own site and blowfish's exampleSite, but it seems like in some scenarios this might occur. Could you possible link the repo of the site where this occurs? Then I could do some debugging to fix this. It will take me some time to start working on this though. Meaning I could start i probably 12h.

Note

The same logic was used before in for example

blowfish/layouts/partials/hero/background.html

Line 22 in f806c36

{{ if and ($backgroundImage) (not (or ($disableImageOptimization) (strings.HasSuffix $backgroundImage.Name ".svg"))) }}

but not on exactly the same images.

Also not checking explicitly if {{ . }} exists. But I'm pretty sure that it should anyways.

[ZhenShuo2021]

Thanks for reporting this issue. I believe the problem was caused by changes in #2268, which didn’t check whether certain settings like defaultBackgroundImage and defaultFeaturedImage were properly set.

The fix is in #2317 and is pending review.

[rsyncOSX]

Thanks for a great theme. I am using it for my photos, and here it is :
https://github.com/rsyncOSX/bfphoto
https://photosbythomas.netlify.app

[kieran-lowe]

Just adding I'm getting exactly the same error.

[jsabater]

Hey, @ZhenShuo2021 ! Just popped in to say that I am having the same error, but I saw that you already submitted a fix, so I'll wait for the next release. Meanwhile, I'll try to figure out how to revert back to the previous version (I had it written down somewhere, heh)

WARN  deprecated: The "_build" front matter key was deprecated in Hugo 0.145.0 and will be removed in a future release. Use "build" instead. See https://gohugo.io/content-management/build-options.

ERROR render of "[..] content/categories/virtualisation/_index.md" failed: "[..] themes/blowfish/layouts/_default/baseof.html:12:6": execute of template failed: template: term.html:12:6: executing "term.html" at <partial "head.html" .>: error calling partial: "[..] themes/blowfish/layouts/partials/head.html:78:58": execute of template failed: template: _partials/head.html:78:58: executing "_partials/head.html" at <.Name>: nil pointer evaluating interface {}.Name

I have tried both with versions 0.147.9 and 0.148.0 of Hugo.

[jsabater]

Ah, I found my notes. For those in need to temporarily revert back to version 2.87.0, here you are the commands:

cd themes/blowfish
git checkout v2.87.0
cd -

Then commit the changes, as usual.

[servedsmart]

Just as a sidenote, to make preventing mistakes like mine, we could add build tests.

See #2319 if you want to vote for/against that.

[rsyncOSX]

git checkout v2.87.0

Thanks, that did the magic :-)