The following test is failing in Tier1 in the JDK15 CI:

compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.java

Here's a snippet from the log file:

----------System.out:(6/542)----------
CompileCommand: exclude compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.check
CompileCommand: dontinline compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.testFrame
CompileCommand: dontinline compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.testFrame2
CompileCommand: inline compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.recurse
CompileCommand: inline compiler/jvmci/compilerToVM/MaterializeVirtualObjectTest.testFrame3
CASE: invalidate=false, materializedMethod=testFrame, notMaterializedMethod=testFrame2
----------System.err:(23/2301)----------
java.lang.RuntimeException: CASE: invalidate=false, materializedMethod=testFrame, notMaterializedMethod=testFrame2: materialized frame has no virtual object before materialization: expected true, was false
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertTrue(Asserts.java:486)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.check(MaterializeVirtualObjectTest.java:307)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.recurse(MaterializeVirtualObjectTest.java:227)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.recurse(MaterializeVirtualObjectTest.java:230)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.recurse(MaterializeVirtualObjectTest.java:230)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.testFrame3(MaterializeVirtualObjectTest.java:218)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.testFrame2(MaterializeVirtualObjectTest.java:209)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.testFrame(MaterializeVirtualObjectTest.java:201)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.test(MaterializeVirtualObjectTest.java:186)
at compiler.jvmci.compilerToVM.MaterializeVirtualObjectTest.main(MaterializeVirtualObjectTest.java:163)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException: CASE: invalidate=false, materializedMethod=testFrame, notMaterializedMethod=testFrame2: materialized frame has no virtual object before materialization: expected true, was false
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: CASE: invalidate=false, materializedMethod=testFrame, notMaterializedMethod=testFrame2: materialized frame has no virtual object before materialization: expected true, was false
----------rerun:(57/9617)*----------

Update: Other tests are hanging.