openjdk jdk16 java/foreign/TestNative.java ClassCastException: java.lang.invoke.DirectHandle incompatible with java.lang.invoke.BoundMethodHandle

[pshipton]

https://ci.eclipse.org/openj9/job/Test_openjdk16_j9_sanity.openjdk_x86-64_windows_Nightly/1/
https://ci.eclipse.org/openj9/job/Test_openjdk16_j9_sanity.openjdk_x86-64_mac_Nightly/1/
https://ci.eclipse.org/openj9/job/Test_openjdk16_j9_sanity.openjdk_x86-64_linux_Nightly/1/
java/foreign/TestNative.java

00:21:10  Caused by: java.lang.ClassCastException: java.lang.invoke.DirectHandle incompatible with java.lang.invoke.BoundMethodHandle
00:21:10  	at java.base/java.lang.invoke.VarHandles.noCheckedExceptions(VarHandles.java:636)
00:21:10  	at java.base/java.lang.invoke.VarHandles.filterCoordinates(VarHandles.java:476)
00:21:10  	at java.base/java.lang.invoke.MethodHandleImpl$1.filterCoordinates(MethodHandleImpl.java:1781)
00:21:10  	at jdk.incubator.foreign/jdk.incubator.foreign.MemoryHandles.filterCoordinates(MemoryHandles.java:374)
00:21:10  	at jdk.incubator.foreign/jdk.internal.foreign.Utils.fixUpVarHandle(Utils.java:102)
00:21:10  	at jdk.incubator.foreign/jdk.internal.foreign.LayoutPath.dereferenceHandle(LayoutPath.java:166)
00:21:10  	at jdk.incubator.foreign/jdk.incubator.foreign.MemoryLayout.lambda$varHandle$2(MemoryLayout.java:488)
00:21:10  	at jdk.incubator.foreign/jdk.incubator.foreign.MemoryLayout$$Lambda$36/0x0000000000000000.apply(Unknown Source)
00:21:10  	at jdk.incubator.foreign/jdk.incubator.foreign.MemoryLayout.computePathOp(MemoryLayout.java:534)
00:21:10  	at jdk.incubator.foreign/jdk.incubator.foreign.MemoryLayout.varHandle(MemoryLayout.java:488)
00:21:10  	at TestNative.<clinit>(TestNative.java:90)

[babsingh]

Identical to #10455. The ClassCastException should be resolved by ibmruntimes/openj9-openjdk-jdk16#9. But, TestNative.java falls under the Foreign Linker API (JEP389; incubator), which won't be supported in the 0.25 release. So, I will exclude this test.

JEP389: #11195

[pshipton]

Strangely it's already excluded. Maybe the tests aren't using the jdk16 exclude list? @smlambert @llxia
https://github.com/AdoptOpenJDK/openjdk-tests/blob/master/openjdk/ProblemList_openjdk16-openj9.txt#L340

[smlambert]

A case where we have been 'tricky' with some native tests... we excluded them in the Problemlists, and then run them via a different TKG target called jdk_foreign_native.

This was so, we can run all remaining tests in jdk_foreign target everywhere and jdk_foreign_native is tagged as 'native' type and not included when run in docker container runs or environments where we do not have the native test libraries and need to run only sanity.openjdk.regular (versus sanity.openjdk.native), related: adoptium/aqa-tests#1921.

[pshipton]

The ClassCastException is resolved, #11760 occurs instead now.