Github user jasontedor commented on the issue:
https://github.com/apache/logging-log4j2/pull/109
@MartyIX The bug report is linked
[above](https://github.com/apache/logging-log4j2/pull/109#issuecomment-326626895).
The bug manifests as that the source line on any logging event will appear to
come from stack locator itself, which is clearly a mistake. This also impacts
the use of the `%l` pattern. This bug only manifests on JDK 9. ---
