some skins have not been guarding themselves against multiple calls to dispose (see issue for details)
Fixed by backing out off dispose if skinnable is null. Added test (parameterized in control class) for all controls in the controls package. Those that failed for the misbehaving skins before are passing after the fix. ------------- Commit messages: - 8244112: Skin implementations: must not violate contract of dispose Changes: https://git.openjdk.java.net/jfx/pull/209/files Webrev: https://webrevs.openjdk.java.net/jfx/209/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8244112 Stats: 241 lines in 7 files changed: 241 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jfx/pull/209.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/209/head:pull/209 PR: https://git.openjdk.java.net/jfx/pull/209
