Failed occured with Swing's nightly regression test on windows-i586:
java.lang.ClassCastException: sun.awt.PostEventQueue
at javax.swing.RepaintManager.currentManager(RepaintManager.java:79)
at javax.swing.RepaintManager.currentManager(RepaintManager.java:98)
at javax.swing.JComponent.repaint(JComponent.java:4296)
at java.awt.Component.repaint(Component.java:2681)
at javax.swing.JComponent.setFont(JComponent.java:2455)
at javax.swing.LookAndFeel.installColorsAndFont(LookAndFeel.java:89)
at javax.swing.plaf.basic.BasicLabelUI.installDefaults(BasicLabelUI.java:276)
at javax.swing.plaf.basic.BasicLabelUI.installUI(BasicLabelUI.java:261)
at javax.swing.JComponent.setUI(JComponent.java:600)
at javax.swing.JLabel.setUI(JLabel.java:237)
at javax.swing.JLabel.updateUI(JLabel.java:247)
at javax.swing.JLabel.<init>(JLabel.java:140)
at javax.swing.JLabel.<init>(JLabel.java:159)
at javax.swing.JSlider$1SmartHashtable$LabelUIResource.<init>(JSlider.java:696)
at javax.swing.JSlider$1SmartHashtable.createLabels(JSlider.java:745)
at javax.swing.JSlider$1SmartHashtable.<init>(JSlider.java:705)
at javax.swing.JSlider.createStandardLabels(JSlider.java:750)
at javax.swing.JSlider.createStandardLabels(JSlider.java:665)
at javax.swing.JSlider.setPaintLabels(JSlider.java:1023)
at javax.swing.colorchooser.DefaultRGBChooserPanel.buildChooser(DefaultRGBChooserPanel.java:210)
at javax.swing.colorchooser.AbstractColorChooserPanel.installChooserPanel(AbstractColorChooserPanel.java:141)
at javax.swing.colorchooser.DefaultRGBChooserPanel.installChooserPanel(DefaultRGBChooserPanel.java:144)
at javax.swing.plaf.basic.BasicColorChooserUI$Handler.propertyChange(BasicColorChooserUI.java:279)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:305)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:242)
at java.awt.Component.firePropertyChange(Component.java:7015)
at javax.swing.JColorChooser.setChooserPanels(JColorChooser.java:454)
at javax.swing.plaf.basic.BasicColorChooserUI.installUI(BasicColorChooserUI.java:89)
at javax.swing.JComponent.setUI(JComponent.java:600)
at javax.swing.JColorChooser.setUI(JColorChooser.java:217)
at javax.swing.JColorChooser.updateUI(JColorChooser.java:228)
at javax.swing.JColorChooser.<init>(JColorChooser.java:191)
at javax.swing.JColorChooser.<init>(JColorChooser.java:179)
at ColorTests.testColorChooser(ColorTests.java:60)
at ColorTests.<init>(ColorTests.java:26)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:275)
at java.lang.Class.newInstance0(Class.java:308)
at java.lang.Class.newInstance(Class.java:261)
at com.sun.javatest.regtest.AppletWrapper$AppletRunner.makeApplet(AppletWrapper.java:348)
at com.sun.javatest.regtest.AppletWrapper$AppletRunner.<init>(AppletWrapper.java:248)
at com.sun.javatest.regtest.AppletWrapper$AppletThread.run(AppletWrapper.java:129)
at java.lang.Thread.run(Thread.java:549)

Note: This may be the same as 4911838