I think the hprof test library is confused about Strings with -XX:-CompactStrings.

% time CONF=macosx-aarch64-server-fastdebug make test TEST=serviceability/HeapDump TEST_VM_OPTS=-XX:-CompactStrings

STDERR:
java.lang.RuntimeException: value for field A.s not found: expected true, was false
at jdk.test.lib.Asserts.fail(Asserts.java:691)
at jdk.test.lib.Asserts.assertTrue(Asserts.java:543)
at FieldsInInstanceTest.verifyDump(FieldsInInstanceTest.java:167)
at FieldsInInstanceTest.main(FieldsInInstanceTest.java:111)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1575)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test