Merge main into develop (#4930)

Author: hmottestad

core/model/src/main/java/org/eclipse/rdf4j/model/impl/ValidatingValueFactory.java

@@ -69,7 +69,7 @@ public ValidatingValueFactory(ValueFactory delegate) {
 	public IRI createIRI(String iri) {
 		try {
 			if (!new ParsedIRI(iri).isAbsolute()) {
-				throw new IllegalArgumentException("IRI must be absolute");
+				throw new IllegalArgumentException("IRI must be absolute: " + iri);
 			}
 			return delegate.createIRI(iri);
 		} catch (URISyntaxException e) {

core/sail/nativerdf/src/main/java/org/eclipse/rdf4j/sail/nativerdf/ValueStore.java

@@ -534,7 +534,7 @@ private NativeValue data2value(int id, byte[] data) throws IOException {
 		case LITERAL_VALUE:
 			return data2literal(id, data);
 		default:
-			throw new IllegalArgumentException("Namespaces cannot be converted into values: " + data2namespace(data));
+			throw new IllegalArgumentException("Invalid type " + data[0] + " for value with id " + id);
 		}
 	}