This fails pretty regularly in Twitter nightly testing with Graal:

Error: Value not atLeast0, field='inlinedBytes', value='-102': expected -102 >= 0
Failed event:
Compilation {
  startTime = 5042961063
  duration = 19889808
  eventThread = {
    osName = "JVMCI CompilerThread7"
    osThreadId = 378225
    javaName = "JVMCI CompilerThread7"
    javaThreadId = 13
    group = {
      parent = null
      name = "system"
    }
  }
  method = {
    type = {
      classLoader = {
        type = null
        name = "bootstrap"
      }
      name = "java/lang/Long"
      package = {
        name = "java/lang"
        module = {
          name = "java.base"
          version = "11.0.0.0.1-internal"
          location = "jrt:/java.base"
          classLoader = {
            type = null
            name = "bootstrap"
          }
        }
        exported = true
      }
      modifiers = 49
    }
    name = "numberOfTrailingZeros"
    descriptor = "(J)I"
    modifiers = 9
    hidden = false
  }
  compileId = 5534
  compileLevel = 4
  succeded = true
  isOsr = false
  codeSize = 104
  inlinedBytes = -102
}

STDERR:
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
java.lang.RuntimeException: Value not atLeast0, field='inlinedBytes', value='-102': expected -102 >= 0
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertGreaterThanOrEqual(Asserts.java:288)
at jdk.test.lib.jfr.EventField.lambda$atLeast$4(EventField.java:76)
at jdk.test.lib.jfr.EventField.doAssert(EventField.java:116)
at jdk.test.lib.jfr.EventField.atLeast(EventField.java:76)
at jdk.jfr.event.compiler.TestCompilerCompile.verifyEvent(TestCompilerCompile.java:139)
at jdk.jfr.event.compiler.TestCompilerCompile.doTest(TestCompilerCompile.java:98)
at jdk.jfr.event.compiler.TestCompilerCompile.main(TestCompilerCompile.java:62)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
at java.base/java.lang.Thread.run(Thread.java:834)