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Posted to fop-dev@xmlgraphics.apache.org by "Peter Orolin (JIRA)" <ji...@apache.org> on 2013/04/16 10:49:16 UTC
[jira] [Created] (FOP-2237) Zoom in "preview screen" should cause
NullPointerException
Peter Orolin created FOP-2237:
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Summary: Zoom in "preview screen" should cause NullPointerException
Key: FOP-2237
URL: https://issues.apache.org/jira/browse/FOP-2237
Project: Fop
Issue Type: Bug
Components: awt renderer
Affects Versions: trunk
Environment: Operating System: Windows
Platform: PC
Reporter: Peter Orolin
[PATCH]Zoom in "preview screen" should cause NullPointerException, because of incorrect use of synchronized in class org.apache.fop.render.awt.viewer.PreviewPanel.
Method PreviewPanel.reload() is synchronized, but it creates new Thread, which is not under synchronized control. Sometimes, when it is later run method PreviewPanel.showPage(), it finishes with NullPointerException (array pagePanels is initialized, but objects in the array not -- see ShowPageImage.run statement pagePanels[pg - firstPage].setPage(pg);)
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