All lines that use a given font stop rendering if 'ö' is inserted - ArrayIndexOutOfBoundsException in TTFSubFont.buildPostTable

When using a couple of different Courier fonts, if I insert the character 'ö' into a line of the pdf any other line that uses the same font will no longer display. Other styles of the same font still work fine.

Example file:

http://s000.tinyupload.com/?file_id=72100196724522466317

This happens in 1.8.8, 1.8.11, and the unreleased 1.8.12 but does not happen in 2.0.0. To display the PDF I've been using the pdfbox app jars for the respective versions which gives the following error:

Mar 22, 2016 11:52:58 AM org.apache.pdfbox.util.PDFStreamEngine processOperator
WARNING: java.lang.ArrayIndexOutOfBoundsException: 18
java.lang.ArrayIndexOutOfBoundsException: 18
at org.apache.fontbox.ttf.TTFSubFont.buildPostTable(TTFSubFont.java:969)
at org.apache.fontbox.ttf.TTFSubFont.writeToStream(TTFSubFont.java:1131)
at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.rebuildTTF(PDTrueTypeFont.java:556)
at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getawtFont(PDTrueTypeFont.java:478)
at org.apache.pdfbox.pdmodel.font.PDSimpleFont.drawString(PDSimpleFont.java:110)
at org.apache.pdfbox.pdfviewer.PageDrawer.processTextPosition(PageDrawer.java:260)
at org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:504)
at org.apache.pdfbox.util.operator.ShowText.process(ShowText.java:56)
at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:562)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:269)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:236)
at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:216)
at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139)
at org.apache.pdfbox.pdfviewer.PDFPagePanel.paint(PDFPagePanel.java:121)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JViewport.paint(JViewport.java:728)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5217)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:290)
at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
at javax.swing.JComponent.paint(JComponent.java:1042)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:79)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:116)
at java.awt.Container.paint(Container.java:1975)
at java.awt.Window.paint(Window.java:3912)
at javax.swing.RepaintManager$4.run(RepaintManager.java:842)
at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)