When a new module is installed (kernel rebuild) the reference between the messenger service and the flashbag is reset. Any messenger service instantiated or any messages set before the this will be lost. See #474684-141: Allow themes to declare dependencies on modules →
Also messages set in the early bootstrap are lost as well. Both of these are a regression introduced by #2760167: Add \Drupal\Core\Messenger\Messenger →
Instead of injecting session.flash_bag into the messenger inject session so that when the messenger service adds a message the session is started.
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In \Drupal\Core\Messenger\Messenger::__construct() change FlashBagInterface to SessionInterface
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Needs review
10.1 ✨
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
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Status message does not appear after running /core/rebuild.php
Closed: duplicate
. Re-rolled #56, but left out changes to system_test_module_preinstall since it looks like we already set a message there and test for it.
The last submitted patch, 62: 2940148-62.patch, failed testing. View results →