The fix adds check that IOPipe is connected before sending "quit" command
------------- Commit messages: - Added check that IOPipe is connected Changes: https://git.openjdk.java.net/jdk17/pull/32/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=32&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8268433 Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jdk17/pull/32.diff Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/32/head:pull/32 PR: https://git.openjdk.java.net/jdk17/pull/32
