Testsuite name: jdk_swing
Test name(s): javax/swing/text/html/8218674/TooltipImageTest.java
Product(s) tested: JDK 11.0.4b07
OS/architecture: Ubuntu 19.04

Reproducible: Always
Reproducible on machine: llg00tuo.uk.oracle.com (Ubuntu 19.04)

Is it a Regression: No, Fails for Previous build JDK11.0.4b06, Test got introduced in JDK11.0.4b06

Does it affect JDK13 : No, Passes with JDK13b24

Is it a platform specific issue: No, Fails on other platforms too.
Ubuntu19.04 : Fail ( llg00tuo.uk.oracle.com)
Ubuntu18.04 : Fail (llg00tug.uk.oracle.com)
Oracle Linux : Fail (llg00fza.uk.oracle.com)

Exception/Error from log:
java.lang.NullPointerException
at TooltipImageTest.main(TooltipImageTest.java:52)
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)