Bug#1104088: simplyhtml: Does not work on Debian Trixie

William Desportes williamdes at wdes.fr
Fri Apr 25 12:42:19 BST 2025 

Package: simplyhtml
Version: 0.17.3+dfsg1-1
Severity: serious
Tags: sid, trixie

I installed the package in Debian Trixie and the splash screen shows for 
a second and then the terminal says:
$ simplyhtml
java.lang.reflect.InvocationTargetException
	at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1371)
	at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1346)
	at com.lightdev.app.shtm.FrmMain.start(FrmMain.java:68)
	at com.lightdev.app.shtm.FrmMain.run(FrmMain.java:116)
	at com.lightdev.app.shtm.App.main(App.java:67)
Caused by: java.lang.NullPointerException: Cannot invoke 
"javax.swing.text.AttributeSet.getAttribute(Object)" because "a" is null
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:54)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFont(ScaledStyleSheet.java:38)
	at 
java.desktop/javax.swing.text.DefaultStyledDocument.getFont(DefaultStyledDocument.java:959)
	at 
java.desktop/javax.swing.text.LabelView.setPropertiesFromAttributes(LabelView.java:145)
	at 
java.desktop/javax.swing.text.html.InlineView.setPropertiesFromAttributes(InlineView.java:187)
	at java.desktop/javax.swing.text.LabelView.sync(LabelView.java:56)
	at java.desktop/javax.swing.text.LabelView.getFont(LabelView.java:209)
	at 
java.desktop/javax.swing.text.GlyphPainter1.sync(GlyphPainter1.java:224)
	at 
java.desktop/javax.swing.text.GlyphPainter1.getSpan(GlyphPainter1.java:59)
	at 
java.desktop/javax.swing.text.GlyphView.getPreferredSpan(GlyphView.java:585)
	at 
java.desktop/javax.swing.text.FlowView$LogicalView.getPreferredSpan(FlowView.java:753)
	at 
java.desktop/javax.swing.text.FlowView.calculateMinorAxisRequirements(FlowView.java:241)
	at 
java.desktop/javax.swing.text.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:709)
	at 
java.desktop/javax.swing.text.html.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:162)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.getMinimumSpan(BoxView.java:569)
	at 
java.desktop/javax.swing.text.html.ParagraphView.getMinimumSpan(ParagraphView.java:275)
	at 
java.desktop/javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:904)
	at 
java.desktop/javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.getMinimumSpan(BoxView.java:569)
	at 
java.desktop/javax.swing.text.html.BlockView.getMinimumSpan(BlockView.java:378)
	at 
java.desktop/javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:904)
	at 
java.desktop/javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.setSpanOnAxis(BoxView.java:344)
	at java.desktop/javax.swing.text.BoxView.layout(BoxView.java:709)
	at java.desktop/javax.swing.text.BoxView.setSize(BoxView.java:398)
	at 
java.desktop/javax.swing.plaf.basic.BasicTextUI$RootView.setSize(BasicTextUI.java:1823)
	at 
java.desktop/javax.swing.plaf.basic.BasicTextUI.getPreferredSize(BasicTextUI.java:948)
	at 
java.desktop/javax.swing.JComponent.getPreferredSize(JComponent.java:1734)
	at 
java.desktop/javax.swing.JEditorPane.getPreferredSize(JEditorPane.java:1392)
	at 
java.desktop/javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:799)
	at java.desktop/java.awt.Container.layout(Container.java:1541)
	at java.desktop/java.awt.Container.doLayout(Container.java:1530)
	at java.desktop/java.awt.Container.validateTree(Container.java:1725)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validate(Container.java:1660)
	at 
java.desktop/java.awt.Container.validateUnconditionally(Container.java:1697)
	at java.desktop/java.awt.Window.pack(Window.java:840)
	at com.lightdev.app.shtm.FrmMain$1.run(FrmMain.java:74)
	at 
java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:308)
	at 
java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
	at 
java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	at 
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at 
java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: 
Cannot invoke "javax.swing.text.AttributeSet.getAttribute(Object)" 
because "a" is null
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:54)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFontScaleFactor(ScaledStyleSheet.java:67)
	at 
com.lightdev.app.shtm.ScaledStyleSheet.getFont(ScaledStyleSheet.java:38)
	at 
java.desktop/javax.swing.text.DefaultStyledDocument.getFont(DefaultStyledDocument.java:959)
	at 
java.desktop/javax.swing.text.LabelView.setPropertiesFromAttributes(LabelView.java:145)
	at 
java.desktop/javax.swing.text.html.InlineView.setPropertiesFromAttributes(InlineView.java:187)
	at java.desktop/javax.swing.text.LabelView.sync(LabelView.java:56)
	at java.desktop/javax.swing.text.LabelView.getFont(LabelView.java:209)
	at 
java.desktop/javax.swing.text.GlyphPainter1.sync(GlyphPainter1.java:224)
	at 
java.desktop/javax.swing.text.GlyphPainter1.getSpan(GlyphPainter1.java:59)
	at 
java.desktop/javax.swing.text.GlyphView.getPreferredSpan(GlyphView.java:585)
	at 
java.desktop/javax.swing.text.FlowView$LogicalView.getPreferredSpan(FlowView.java:753)
	at 
java.desktop/javax.swing.text.FlowView.calculateMinorAxisRequirements(FlowView.java:241)
	at 
java.desktop/javax.swing.text.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:709)
	at 
java.desktop/javax.swing.text.html.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:162)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.getMinimumSpan(BoxView.java:569)
	at 
java.desktop/javax.swing.text.html.ParagraphView.getMinimumSpan(ParagraphView.java:275)
	at 
java.desktop/javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:904)
	at 
java.desktop/javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.getMinimumSpan(BoxView.java:569)
	at 
java.desktop/javax.swing.text.html.BlockView.getMinimumSpan(BlockView.java:378)
	at 
java.desktop/javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:904)
	at 
java.desktop/javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
	at 
java.desktop/javax.swing.text.BoxView.checkRequests(BoxView.java:936)
	at 
java.desktop/javax.swing.text.BoxView.setSpanOnAxis(BoxView.java:344)
	at java.desktop/javax.swing.text.BoxView.layout(BoxView.java:709)
	at java.desktop/javax.swing.text.BoxView.setSize(BoxView.java:398)
	at 
java.desktop/javax.swing.plaf.basic.BasicTextUI$RootView.setSize(BasicTextUI.java:1823)
	at 
java.desktop/javax.swing.plaf.basic.BasicTextUI.getPreferredSize(BasicTextUI.java:948)
	at 
java.desktop/javax.swing.JComponent.getPreferredSize(JComponent.java:1734)
	at 
java.desktop/javax.swing.JEditorPane.getPreferredSize(JEditorPane.java:1392)
	at 
java.desktop/javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:799)
	at java.desktop/java.awt.Container.layout(Container.java:1541)
	at java.desktop/java.awt.Container.doLayout(Container.java:1530)
	at java.desktop/java.awt.Container.validateTree(Container.java:1725)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validateTree(Container.java:1734)
	at java.desktop/java.awt.Container.validate(Container.java:1660)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2778)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828)
	at 
java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:775)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
	at 
java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:98)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:747)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
	at 
java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at 
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:744)
	at 
java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at 
java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at 
java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Same error on a second run. It managed to create the user preferences 
folder.

--
William Desportes

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