The issue is unguarded access to tablePosition though it might be null (since [JDK-8120610](https://bugs.openjdk.java.net/browse/JDK-8120610)
The fix is to check against null in each accessor. Also required to fix the default onEditCommit handlers in Tree/TableColumn to really cope with null TablePostion on the event. Added tests that failed/pass before/after the fix. Note that there was an old test (in Tree/TableColumnTest each), that failed after the fix because it expected the NPE. Fixed by removing the expected parameter. ------------- Commit messages: - 8269871: CellEditEvent: must not throw NPE in accessors Changes: https://git.openjdk.java.net/jfx/pull/611/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=611&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8269871 Stats: 413 lines in 6 files changed: 393 ins; 5 del; 15 mod Patch: https://git.openjdk.java.net/jfx/pull/611.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/611/head:pull/611 PR: https://git.openjdk.java.net/jfx/pull/611
