Empty region rendered when a Views block with no results and 'block_hide_empty' set is in the region

Hmm I'm not sure if this is a Views issue or a page layout issue. The block isn't rendered at all, so the 'block_hide_empty' works as advertised. But the page thinks something will be rendered, so the region is rendered (and then turns out to be empty).

Adding a test to illustrate the problem, but again, not sure if Views is the right place to test or fix this.

Oh and any empty Views block will make this happen.

So making a block showing content filtered on a content type that has no nodes works just as well as the steps outlined in the issue summary.

Hmm looking at it more this just seems like a duplicate/symptom of #953034: [meta] Themes improperly check renderable arrays when determining visibility.

I'm having the same issue in D8.0.5

#5: indeed.

I have the same issue with a menu block i.e. in the first sidebar. Even it is empty the following code is rendered:

<aside class="col-sm-3" role="complementary">
</aside>

This happens in Bartik

still in D8.1.3

Closing this as a duplicate of #953034: [meta] Themes improperly check renderable arrays when determining visibility, this has nothing to do with Views or Menu, but only with placeholders for dynamic blocks (which Views and Menus tend to be).

Cross-post from #2443457. Just following up here that the current workaround until a solution to #953034: [meta] Themes improperly check renderable arrays when determining visibility lands is to render the output of the region the block is placed in to determine whether to render the region.

Eg. in page.html.twig in your theme:

{# render and strip out everything except images, iframes, objects and svgs that don't have any inner html #}
{% set has_sidebar_right = page.sidebar_right|render|striptags('<img><iframe><object><svg>')|trim|length %}

...

{% if has_sidebar_right %}
  {{ page.sidebar_right }}
{% endif %}

...