[jdk13u-dev] RFR: 8234691: Potential double-free in ParallelSPCleanupTask constructor

[Olga Mikhaltsova]

I'd like to backport JDK-8234691 to jdk13u for parity with jdk11u.
The original patch applied cleanly.
All regular tests passed.

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Commit messages:
 - Backport f8f698465d534af375d4f1a36b0f8d1bf12073cb

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/163/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=163&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8234691
  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/163.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/163/head:pull/163

PR: https://git.openjdk.java.net/jdk13u-dev/pull/163