[BUG] Return a comprehensible error when a 404 `mwplus` subpath is `.assign`'d-to.

[roke-julian-lockhart]

What The Problem Is

Any invalid path appended to //meza.wiki/mwplus/ returns a database query error, which is not informative.

How To Reproduce It

Consider the example that //reddit.com/r/mediawiki/comments/1k874lv/comment/mp40q4v provides: it cites ../mwplus/MediaWiki_Users_and_Developers_Workshop_Spring_2025, which is, now, 404. The user is unable to easily ascertain this:

1. #!/usr/bin/env pwsh
   curl https://meza.wiki/mwplus/!

2. MediaWiki internal error.<br />
   <br />
   Original exception: [aaSODGTInPMe@1k5D2a-CwAAAMI] 2026-03-01 19:05:48: Fatal exception of type &quot;Wikimedia\Rdbms\DBQueryError&quot;<br />
   <br />
   Exception caught inside exception handler.<br />
   <br />
   Set $wgShowExceptionDetails = true; at the bottom of LocalSettings.php to show detailed debugging information.<br />

The Expected Behavior

It should inform the user that the path does not exist.

Outside Core

If your bug is about a user experience, it is most likely an upstream bug in one of the platform components, but we might be able to help you identify where to report it if you tell us how you were using the platform.

Please do.

My Environment

• OS

  1. #!/usr/bin/env sh
     cat /etc/os-release | jc --ini | jq 'with_entries(.value |= (if type=="string" and test("^[0-9]+$") then tonumber else . end))| {VARIANT, NAME, VERSION_ID}' | yq -P

  2. VARIANT: KDE Plasma Desktop Edition
     NAME: Fedora Linux
     VERSION_ID: 43

• Browser

  1. #!/usr/bin/env sh
     desktop=$(xdg-settings get default-web-browser)
     dnf5 repoquery --location $(rpm -qf $(command -v $(grep -h -m1 '^Exec=' /usr/share/applications/$desktop ~/.local/share/applications/$desktop 2>/dev/null | cut -d= -f2 | sed 's/ %.*//')))

  2. https://packages.mozilla.org/rpm/firefox/Packages/7af7058d47721d2ffd1d91ef3ecd04d4d8cd8cbd8a222218d27298576dc8193b-firefox-nightly-150.0a1-20260228210222.x86_64.rpm

  Details

  In case that URI is ever 404, it's:

  1. #!/usr/bin/env sh
     desktop=$(xdg-settings get default-web-browser)
     rpm -qf $(command -v $(grep -h -m1 '^Exec=' /usr/share/applications/$desktop ~/.local/share/applications/$desktop 2>/dev/null | cut -d= -f2 | sed 's/ %.*//')) --queryformat $'Name        : %{NAME}\nVersion     : %{VERSION}\nRelease     : %{RELEASE}\nArchitecture: %{ARCH}\nInstall Date: %{INSTALLTIME:date}\nSize        : %{SIZE}\nSignature   : %{SIGPGP:pgpsig}\nSource RPM  : %{SOURCERPM}\nBuild Date  : %{BUILDTIME:date}\nBuild Host  : %{BUILDHOST}\nVendor      : %{VENDOR}\n'

  2. Name        : firefox-nightly
     Version     : 150.0a1
     Release     : 20260228210222
     Architecture: x86_64
     Install Date: Sun 01 Mar 2026 01:08:25 GMT
     Size        : 381607927
     Signature   : (none)
     Source RPM  : firefox-nightly-150.0a1-20260228210222.src.rpm
     Build Date  : Sat 28 Feb 2026 23:24:16 GMT
     Build Host  : 17557a0c1991
     Vendor      : Mozilla

     ¹

Footnotes

1. mikefarah/yq/discussions/1945#discussioncomment-15963964 ↩