The module drupal/entity_usage includes a hardcoded assumption that the public file system uses a local stream wrapper (LocalStream). This is reflected in the assertion:
assert($publicStream instanceof LocalStream);
However, when using external file systems (such as the drupal/s3fs module for Amazon S3), the public stream wrapper implements the generic StreamWrapperInterface but does not extend LocalStream. Therefore, the assertion fails and throws an exception, making the module incompatible with setups using external file storage.
assert($publicStream instanceof LocalStream);
Modify the assertion to validate the general interface rather than the specific local implementation, ensuring compatibility with external stream wrappers like drupal/s3fs. Update the line from:
assert($publicStream instanceof LocalStream);
to
assert($publicStream instanceof StreamWrapperInterface);
This general approach ensures broader compatibility across different storage backends.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I can confirm that this solves the issue of a failed assertion when using s3fs
Issue #3514883 by m4rcw0lf, kevinb623, marcoscano: Assertion fails when...