The following test failed in the JDK16 CI:

javax/swing/Headless/HeadlessJTabbedPane.java

Here's a snippet from the log file:

#section:main
----------messages:(5/279)----------
command: main -Djava.awt.headless=true HeadlessJTabbedPane
reason: User specified action: run main/othervm -Djava.awt.headless=true HeadlessJTabbedPane
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 1.441
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(33/3457)----------
Warning: the fonts "Lucida Grande" and "Lucida Grande" are not available for the Java logical font "Dialog", which may have unexpected appearance or behavior. Re-enable the "Lucida Grande" font to remove this warning.
Warning: the fonts "Times" and "Times" are not available for the Java logical font "Serif", which may have unexpected appearance or behavior. Re-enable the "Times" font to remove this warning.
Warning: the fonts "Lucida Grande" and "Lucida Grande" are not available for the Java logical font "SansSerif", which may have unexpected appearance or behavior. Re-enable the "Lucida Grande" font to remove this warning.
Warning: the fonts "Menlo" and "Courier" are not available for the Java logical font "Monospaced", which may have unexpected appearance or behavior. Re-enable the "Menlo" font to remove this warning.
Warning: the fonts "Lucida Grande" and "Lucida Grande" are not available for the Java logical font "DialogInput", which may have unexpected appearance or behavior. Re-enable the "Lucida Grande" font to remove this warning.
java.lang.NullPointerException: Cannot read field "handle" because the return value of "sun.font.FontManager.findFont2D(String, int, int)" is null
at java.desktop/java.awt.Font.getFont2D(Font.java:527)
at java.desktop/java.awt.Font$FontAccessImpl.getFont2D(Font.java:264)
at java.desktop/sun.font.FontUtilities.getFont2D(FontUtilities.java:147)
at java.desktop/sun.font.FontDesignMetrics.initMatrixAndMetrics(FontDesignMetrics.java:354)
at java.desktop/sun.font.FontDesignMetrics.<init>(FontDesignMetrics.java:347)
at java.desktop/sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:299)
at java.desktop/sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:1243)
at java.desktop/javax.swing.JComponent.getFontMetrics(JComponent.java:1646)
at java.desktop/javax.swing.plaf.basic.BasicTabbedPaneUI.getFontMetrics(BasicTabbedPaneUI.java:2140)
at java.desktop/javax.swing.plaf.basic.BasicTabbedPaneUI.calculateMaxTabWidth(BasicTabbedPaneUI.java:2054)
at java.desktop/javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.calculateSize(BasicTabbedPaneUI.java:2732)
at java.desktop/javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.preferredLayoutSize(BasicTabbedPaneUI.java:2675)
at java.desktop/java.awt.Container.preferredSize(Container.java:1824)
at java.desktop/java.awt.Container.getPreferredSize(Container.java:1808)
at java.desktop/javax.swing.JComponent.getPreferredSize(JComponent.java:1682)
at HeadlessJTabbedPane.main(HeadlessJTabbedPane.java:44)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.NullPointerException: Cannot read field "handle" because the return value of "sun.font.FontManager.findFont2D(String, int, int)" is null
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.NullPointerException: Cannot read field "handle" because the return value of "sun.font.FontManager.findFont2D(String, int, int)" is null
----------rerun:(38/5657)*----------