Attempting to add RDF* Data to a Native Repository Breaks the Repository

[mnmercer]

Current Behavior

After attempting to add Turtle-star data to a Native Repository, it unsurprisingly throws an error as it appears only MemoryStores have the experimental support for RDF* (correct me if I'm wrong). This is fine, however afterwards no other queries can be run against the Repository, effectively bricking it for an entire application.

Expected Behavior

After the NativeStore rejects Turtle-star or TriG-star data with an appropriate exception, the Repository should still be usable.

Steps To Reproduce

1. Run the following code and notice the exception thrown by the second try block

String data = """
        @prefix ex: <http://example.org/> .
        @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
                        
        # Basic triples
        ex:JohnDoe ex:worksAt ex:CompanyX .
                        
        # RDF* triples
        <<ex:JohnDoe ex:worksAt ex:CompanyX>> ex:since "2022-01-01"^^xsd:date .
        """;
File dataDir = Files.createTempDir();
Repository repo = new SailRepository(new NativeStore(dataDir));
try (RepositoryConnection conn = repo.getConnection()) {
    conn.add(new ByteArrayInputStream(data.getBytes()), null, RDFFormat.TURTLE);
} catch (Exception ex) {
    ex.printStackTrace();
}

try (RepositoryConnection conn = repo.getConnection(); RepositoryResult<Statement> result = conn.getStatements(null, null, null)) {
    result.forEach(System.out::println);
} finally {
    dataDir.delete();
}

Version

5.0.2

Are you interested in contributing a solution yourself?

No

Anything else?

I first encountered the issue with version 4.3.7, but I confirmed the same issue occurs with 5.0.2.
The initial exception thrown when the data is rejected is java.lang.IllegalArgumentException: value parameter should be a URI, BNode or Literal with an additional exception of java.lang.NullPointerException: Cannot invoke "org.eclipse.rdf4j.common.concurrent.locks.Lock.release()" because "this.txnLock" is null. Then the second try block throws java.lang.IllegalArgumentException: value parameter should be a URI, BNode or Literal again.