Issue #3484746 by grimreaper, pdureau: Use "is sequence" Twig test to prevent...

Issue #3484746 by grimreaper, pdureau: Use "is sequence" Twig test to prevent fatal errors when looping on slots

components/carousel/carousel.twig

@@ -17,6 +17,7 @@
 {% set attributes = attributes.setAttribute('data-bs-interval', interval) %}
 {% set attributes = attributes.setAttribute('data-bs-ride', data_bs_ride) %}
 {% set carousel_id = carousel_id|default("carousel-" ~ random()) %}
+{% set slides = slides is sequence ? slides : [slides] %}
 
 <div{{ attributes.addClass('carousel').addClass('slide').setAttribute('id', carousel_id) }}>
 

components/grid_row/grid_row.twig

-{% if with_container %}
-  <div class="container">
-{% endif %}
-
 {% set attributes = gutters ? attributes.addClass(gutters) : attributes %}
 {% set attributes = gutters_horizontal ? attributes.addClass(gutters_horizontal) : attributes %}
 {% set attributes = gutters_vertical ? attributes.addClass(gutters_vertical) : attributes %}
+{% set content = content is sequence ? content : [content] %}
+
+{% if with_container %}
+  <div class="container">
+{% endif %}
 
 <div{{ attributes.addClass('row') }}>
   {% for item in content %}

components/list/list.twig

@@ -3,6 +3,7 @@
 {% endif %}
 
 {% set list_type = list_type|default('ul') %}
+{% set items = items is sequence ? items : [items] %}
 
 <{{ list_type }}{{ attributes }}>
   {% for item in items %}

components/nav/nav.twig

@@ -5,6 +5,7 @@
   {% set attributes = card_header and 'pills' in variant ? attributes.addClass('card-header-pills') : attributes %}
 {% endif %}
 
+{% set tab_content = tab_content is sequence ? tab_content : [tab_content] %}
 {% set nav_id = nav_id|default('nav-' ~ random()) %}
 {% set nav_type = nav_type|default('ul') %}
 {% set link_type = tab_content ? 'button' : 'a' %}

components/table/table.twig

@@ -18,6 +18,7 @@
 {% set attributes = borders ? attributes.addClass('table-' ~ borders|lower|replace({'_': '-'})) : attributes %}
 {% set attributes = hover ? attributes.addClass('table-hover') : attributes %}
 {% set attributes = caption_top ? attributes.addClass('caption-top') : attributes %}
+{% set colgroups = colgroups is sequence ? colgroups : [colgroups] %}
 
 {% if header_color %}
   {% set thead_attributes = thead_attributes.addClass('table-' ~ header_color|lower|replace({'_': '-'})) %}
@@ -58,8 +59,9 @@
 
   {% for colgroup in colgroups %}
     {% if colgroup.cols %}
+      {% set colgroup_cols = colgroup.cols is sequence ? colgroup.cols : [colgroup.cols] %}
       <colgroup{{ colgroup.attributes }}>
-        {% for col in colgroup.cols %}
+        {% for col in colgroup_cols %}
           <col{{ col.attributes }} />
         {% endfor %}
       </colgroup>