The test times out not always, but quite often on various platforms

A part of jstack output:

Thread: 0x00007f85f06ce800 [0x23a0] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
   JavaThread state: _thread_blocked
at java.lang.invoke.MethodHandleNatives.resolve(java.base@9-internal/Native Method)
at java.lang.invoke.MemberName$Factory.resolve(java.base@9-internal/MemberName.java:1045)
at java.lang.invoke.MemberName$Factory.resolveOrFail(java.base@9-internal/MemberName.java:1070)
at java.lang.invoke.InvokerBytecodeGenerator.resolveInvokerMember(java.base@9-internal/InvokerBytecodeGenerator.java:289)
at java.lang.invoke.InvokerBytecodeGenerator.loadMethod(java.base@9-internal/InvokerBytecodeGenerator.java:274)
at java.lang.invoke.InvokerBytecodeGenerator.generateCustomizedCode(java.base@9-internal/InvokerBytecodeGenerator.java:605)
at java.lang.invoke.LambdaForm.compileToBytecode(java.base@9-internal/LambdaForm.java:759)
at java.lang.invoke.LambdaForm.<init>(java.base@9-internal/LambdaForm.java:286)
at java.lang.invoke.LambdaForm.<init>(java.base@9-internal/LambdaForm.java:271)
at java.lang.invoke.LambdaFormBuffer.lambdaForm(java.base@9-internal/LambdaFormBuffer.java:61)
at java.lang.invoke.LambdaFormBuffer.endEdit(java.base@9-internal/LambdaFormBuffer.java:316)
at java.lang.invoke.LambdaFormEditor.makeArgumentCombinationForm(java.base@9-internal/LambdaFormEditor.java:709)
at java.lang.invoke.LambdaFormEditor.filterArgumentForm(java.base@9-internal/LambdaFormEditor.java:648)
at java.lang.invoke.MethodHandleImpl.makePairwiseConvertByEditor(java.base@9-internal/MethodHandleImpl.java:303)
at java.lang.invoke.MethodHandleImpl.makePairwiseConvert(java.base@9-internal/MethodHandleImpl.java:267)
at java.lang.invoke.MethodHandleImpl.makePairwiseConvert(java.base@9-internal/MethodHandleImpl.java:434)
at java.lang.invoke.MethodHandle.asTypeUncached(java.base@9-internal/MethodHandle.java:786)
at java.lang.invoke.MethodHandle.asType(java.base@9-internal/MethodHandle.java:771)
at java.lang.invoke.MethodHandle.invokeWithArguments(java.base@9-internal/MethodHandle.java:637)
at java.lang.invoke.MethodHandleImpl.loop(java.base@9-internal/MethodHandleImpl.java:1889)
at java.lang.invoke.LambdaForm$DMH/576156475.invokeStatic_L6_L(java.base@9-internal/LambdaForm$DMH)
at java.lang.invoke.LambdaForm$NFI/184019690.invoke_L6_L(java.base@9-internal/LambdaForm$NFI)
at java.lang.invoke.LambdaForm$DMH/981535149.invokeStatic_LL_L(java.base@9-internal/LambdaForm$DMH)
at java.lang.invoke.LambdaForm$NamedFunction.invokeWithArguments(java.base@9-internal/LambdaForm.java:1239)
at java.lang.invoke.LambdaForm.interpretName(java.base@9-internal/LambdaForm.java:917)
at java.lang.invoke.LambdaForm.interpretWithArguments(java.base@9-internal/LambdaForm.java:894)
at java.lang.invoke.LambdaForm$LFI/830790432.interpret_I(java.base@9-internal/LambdaForm$LFI)
at java.lang.invoke.LambdaForm$MH/1343571994.invoke_MT(java.base@9-internal/LambdaForm$MH)
at test.java.lang.invoke.LoopCombinatorLongSignatureTest.testLongSignature(LoopCombinatorLongSignatureTest.java:84)
at test.java.lang.invoke.LoopCombinatorLongSignatureTest.main(LoopCombinatorLongSignatureTest.java:55)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:533)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.lang.Thread.run(java.base@9-internal/Thread.java:843)