[BUG] jsontiddlers macro doesn't seem to have access to in-scope variables

[hoelzro]

Describe the bug

This expression doesn't output the current tiddler as serialized JSON:

<<jsontiddlers filter:"[is[current]]">>

Instead, you just get [], because that filter yields no titles - it seems that this is because the filter provided to jsontiddlers doesn't have access to the currentTiddler variable.

This isn't a huge bug, but it was definitely surprising behavior!

Expected behavior

I expect that jsontiddlers (and any macro that takes a filter expression, for that matter) has access to variables currently in scope.

To Reproduce

1. Go to tiddlywiki.com
2. Create a tiddler named "jsontiddlers target"
3. Create another tiddler with the following content:

<<jsontiddlers filter:"[[jsontiddlers target]]">>

---

<$set name="target" value="jsontiddlers target">
<<jsontiddlers filter:"[<target>]">>
</$set>

4. The output should be identical, but it's not

Screenshots

No response

TiddlyWiki Configuration

• Version: 5.3.8
• Saving mechanism: Manual
• Plugins: whatever's installed on tiddlywiki.com
• OS: Arch Linux
• Browser: Firefox 143.0.4

Additional context

No response