Progression, cumulative SVG chart leads to a stacktrace

SLH 2019-03-24 (Ubuntu 18.04)

la Progression en densité de 3 mots dans VOEUX provoque une stacktrace (la progression s’affiche correctement) :

Progression de <[[word="France"], [word="pays"], [word="Europe"], [word="monde"]]> dans le corpus VOEUX...
Sauvegarde du graphique dans le fichier : /home/sheiden/TXM-0.8.0/results/progression_density6712310819957726674.svg.

!ENTRY org.eclipse.ui 4 0 2019-03-23 17:35:58.671
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NullPointerException
    at java.awt.Container.addImpl(Container.java:1095)
    at java.awt.Container.add(Container.java:419)
    at org.txm.chartsengine.rcswt.SwingChartComposite.loadChart(SwingChartComposite.java:877)
    at org.txm.chartsengine.rcswt.ChartComposite.loadChart(ChartComposite.java:91)
    at org.txm.chartsengine.rceditors.ChartEditor$2.run(ChartEditor.java:460)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:233)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:144)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:5535)
    at org.txm.chartsengine.rceditors.ChartEditor.loadChart(ChartEditor.java:457)
    at org.txm.chartsengine.rceditors.ChartEditor.updateEditorFromResult(ChartEditor.java:302)
    at org.txm.rceditors.TXMEditor.refresh(TXMEditor.java:1059)
    at org.txm.rceditors.TXMEditor$4$2.run(TXMEditor.java:930)
    at org.eclipse.ui.internal.PendingSyncExec.run(PendingSyncExec.java:58)
    at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:168)
    at org.eclipse.ui.internal.UISynchronizer.lambda$0(UISynchronizer.java:150)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4577)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4186)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
    at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
    at org.txm.rcApplication.start(Application.java:240)
    at org.eclipse.equinox.internal.apEclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1472)
392, 153, 141, 139 position(s).

(from redmine: issue id 2527, created on 2019/03/26 by Sebastien Jacquot)

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Progression, cumulative SVG chart leads to a stacktrace

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