[jdk11u-dev] RFR: 8254802: ThrowingPushPromisesAsStringCustom.java fails in "try throwing in GET_BODY"

[Goetz Lindenmaier]

I backport this for parity with 11.0.14-oracle.

-------------

Commit messages:
 - Backport 566d77a2ae4ee8830c989ea03f7bc6923df061cd

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/465/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=465&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254802
  Stats: 20 lines in 1 file changed: 20 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/465.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/465/head:pull/465

PR: https://git.openjdk.java.net/jdk11u-dev/pull/465