Ever after its inception in 11u with JDK-8262121, we see TestStackFrameLineNumbers.java failing occasionally with:

java.lang.Exception: No line number information found
at jdk.jfr.event.sampling.TestStackFrameLineNumbers.main(TestStackFrameLineNumbers.java:89)
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:566)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:829)