The same path alias cannot be set for two languages

Updating issue summary with some details and slightly reordering steps to what makes sense.

Thanks for IS update @klonos, with that information I was able to create a test and replicate the bug. Here's a new patch, and a test-only patch.

The last submitted patch, 48: 3179599-48-test-only.patch, failed testing. View results →

Nice work @murilohp

+++ b/core/modules/path/tests/src/Functional/PathLanguageTest.php
@@ -212,4 +212,32 @@ public function testAliasTranslation() {
+    $this->assertSession()->pageTextContains('Basic page ' . $edit['title[0][value]'] . ' has been created.');

I don't really like this as a way of verifying the outcome here. I'd prefer to see something that proves more explicitly that we really have 2 nodes with the correct different paths.

Otherwise RTBC.

Re-roll patch #48 and apply changes #50

Hey! Thanks for the review @jonathanshaw! I've updated the test, now, the test will test,validate the page and also asserts the path alias.

@Nikhil_110, thanks for the patch, but I didn't get what you've done, you basically changed an unrelated test, so this new patch is based on #48.

+++ b/core/modules/path/src/Plugin/Field/FieldWidget/PathWidget.php
@@ -83,7 +83,12 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
+    $other_alias = \Drupal::service('path_alias.manager')->getPathByAlias($alias, $form_values['langcode'][0]['value']);

This could do with a comment to explain what it's doing.

Currently it looks like it's part of the 'Trim...' code.