Github user afs commented on the issue:
https://github.com/apache/jena/pull/311
This includes efficiency improvement as well. For a non-SILENT LOAD into
one of the fully transactional stores, it is done direct, no read buffering to
deal with pesky syntax errors. If it goes wrong, the exception propagates up
and the transaction aborts as normal (if `Txn` is used or the transaction cycle
is written out long form properly).---
