Strict route parameter compare leads to duplication on term pages

I am also getting this. The patch resolved the issue for taxonomy term pages via views, but there is also a duplicate crumb when visiting views pages in the menu.

Maybe this module needs something like Easy Breadcrumb's removeRepeatedSegments?

Environment

• Drupal: 11.4.4
• PHP: 8.5.5
• Database: MariaDB 10.11.16
• DDEV: v1.25.2
• Menu Breadcrumb: 2.0.x-dev (403ce36)
• Browser: Chrome

Prerequisites

• Install and enable the module on the branch the issue targets:

ddev composer require 'drupal/menu_breadcrumb:2.0.x-dev@dev'
ddev drush en menu_breadcrumb -y

• Core's taxonomy_term view must be enabled (default), so that the term page route carries the view_id and display_id parameters.
• Create a term and a main menu link pointing at it:

ddev drush php:eval '
use Drupal\taxonomy\Entity\Vocabulary;
use Drupal\taxonomy\Entity\Term;
use Drupal\menu_link_content\Entity\MenuLinkContent;
if (!Vocabulary::load("tags")) { Vocabulary::create(["vid" => "tags", "name" => "Tags"])->save(); }
$term = Term::create(["vid" => "tags", "name" => "Breadcrumb Test Term"]);
$term->save();
MenuLinkContent::create([
  "title" => "Breadcrumb Test Term",
  "link" => ["uri" => "internal:/taxonomy/term/" . $term->id()],
  "menu_name" => "main",
])->save();
print $term->id();
'

• Enable the Main navigation menu at /admin/config/user-interface/menu-breadcrumb and tick Append current page to breadcrumb. Without the append option the module drops the last crumb, which hides the duplicate.
• Log in as administrator: ddev drush uli

Steps

1. Before applying anything, visit /taxonomy/term/1 and look at the breadcrumb.
2. Apply the fix from MR !36: in MenuBasedBreadcrumbBuilder::addMissingCurrentPage() the route parameter comparison changes from === to ==.
3. Rebuild caches: ddev drush cr
4. Visit /taxonomy/term/1 again and compare the breadcrumb.
5. Visit a term page that has no menu link (e.g. /taxonomy/term/2) and a node page to confirm nothing else changed.

Expected results

• The term page breadcrumb reads Home › Breadcrumb Test Term — the current page appears exactly once.
• Pages whose current page is genuinely missing from the menu trail are unaffected.

Actual results

Before the fix the breadcrumb on /taxonomy/term/1 read Home › Breadcrumb Test Term › Breadcrumb Test Term. The menu link stores its route parameters as taxonomy_term, display_id, view_id, while the route match returns them as taxonomy_term, view_id, display_id; both arrays hold the same key/value pairs but in a different order, so the === comparison failed and addMissingCurrentPage() appended the current page on top of the menu link. After applying MR !36 the breadcrumb read Home › Breadcrumb Test Term. A term page without a menu link and a node page were checked afterwards and produced the same breadcrumbs as before the change, so the loosened comparison does not suppress a legitimately missing current page.

Testing produced with the assistance of an LLM.