To fix [1], please consider the patch [2]. This follows on from the proposed change [3] which in turn follows from [4].
Thanks, Brian [1] https://bugs.openjdk.java.net/browse/JDK-8181919 [2] http://cr.openjdk.java.net/~bpb/8181919/webrev.00/ [3] https://mail.openjdk.java.net/pipermail/core-libs-dev/2020-August/068025.html (GetXSpace should not run on AIX) [4] http://mail.openjdk.java.net/pipermail/core-libs-dev/2020-July/067990.html (GetXSpace fails on macOS)