An exception occurs when the main thread disposes of the frame while the other thread still renders to it. The fix joins the main thread to other threads, so we will dispose of the frame at the end only.
------------- Commit messages: - Initial fix Changes: https://git.openjdk.java.net/jdk/pull/3957/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3957&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8047218 Stats: 20 lines in 2 files changed: 0 ins; 9 del; 11 mod Patch: https://git.openjdk.java.net/jdk/pull/3957.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/3957/head:pull/3957 PR: https://git.openjdk.java.net/jdk/pull/3957
