Layouts/Reports Filtered Attribute Table Filtering Broken

[qgib]

Author Name: Spencer Gardner (@spencerrecneps)
Original Redmine Issue: 21414
Affected QGIS version: 3.4.5
Redmine category:map_composer/printing

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Attribute table objects do not populate with data when added to a Layout or Report and filtered to an Atlas object. When the table is added the column headings are visible but no rows are displayed. Appears to be a regression--I had this working in 3.4.2.

Steps to reproduce:

1. Create a new map document
2. Add a layer with at least one feature to the map
3. Add a non-geometry table to the map with an attribute matching an attribute in the layer from Some minor updates to documentation and added shortname to the quickpackage script #2
4. Create a new Layout
5. Add an attribute table to the Layout
6. Activate the Atlas
7. Filter the attribute table with an expression like the following (modified for your dataset:
   "my_attribute" = attribute(@atlas_feature,'my_attribute')

What should happen: the table is displayed with attribute data from the current Atlas feature
What happens: the table columns are displayed but no feature data is shown

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• priority_id was changed from Normal to High

[qgib]

Author Name: Spencer Gardner (@spencerrecneps)

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It appears this was due to a missed backport on a bugfix to the master branch.
See: #9306

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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• resolution was changed from to fixed/implemented
• status_id was changed from Open to Closed