RFR: 8268525: Some new memory leak after JDK-8248268 and JDK-8255557

[Weijun Wang]

Remove newly leaked memory.

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Commit messages:
 - 8268525: Some new memory leak after JDK-8248268 and JDK-8255557

Changes: https://git.openjdk.java.net/jdk/pull/4466/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4466&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268525
  Stats: 88 lines in 5 files changed: 45 ins; 19 del; 24 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4466.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4466/head:pull/4466

PR: https://git.openjdk.java.net/jdk/pull/4466