A DESCRIPTION OF THE PROBLEM :
When many font files are copied to "<JRE_HOME_DIR>\lib\fonts\fallback" directory, then "java.lang.ArrayIndexOutOfBoundsException" is thrown from "sun.font.FileFontStrike.getCachedGlyphPtr()" method with JDK 7u99.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Install JDK 7 to be tested.
2. Copy "C:\Windows\Fonts" directory to "<JDK_HOME>\jre\lib\fonts".
3. Rename "<JDK_HOME>\jre\lib\fonts\Fonts" directory to "<JDK_HOME>\jre\lib\fonts\fallback".
4. Run "Font2DTest" demo from JDK 7 Demos and Samples package with JDK 7 to be tested.

<JDK_HOME>\jre\bin\java -jar <JDK7_DEMOS_DIR>\demo\jfc\Font2DTest\Font2DTest.jar

5. In "Range:" combo box select "Private User Area" value. The issue is reproduced if the exception "java.lang.ArrayIndexOutOfBoundsException" is printed in the console and if no glyphs are displayed in the selected range unlike in JDK 8. Absence and presence of glyphs is displayed on the attached images "Actual_JDK7.png", "Expected_JDK8.png".

-------------------- Call stack of the exception reproduced with JDK 7u99 --------------------
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -61865861
        at sun.font.FileFontStrike.getCachedGlyphPtr(Unknown Source)
        at sun.font.FileFontStrike.getSlot0GlyphImagePtrs(Unknown Source)
        at sun.font.CompositeStrike.getGlyphImagePtrs(Unknown Source)
        at sun.font.GlyphList.mapChars(Unknown Source)
        at sun.font.GlyphList.setFromString(Unknown Source)
        at sun.java2d.pipe.GlyphListPipe.drawString(Unknown Source)
        at sun.java2d.SunGraphics2D.drawString(Unknown Source)
        at FontPanel$FontCanvas.modeSpecificDrawChar(FontPanel.java:606)
        at FontPanel$FontCanvas.drawText(FontPanel.java:938)
        at FontPanel$FontCanvas.paintComponent(FontPanel.java:997)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JLayeredPane.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paintToOffscreen(Unknown Source)
        at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
        at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
        at javax.swing.RepaintManager.paint(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
        at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
        at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
        at java.awt.Container.paint(Unknown Source)
        at java.awt.Window.paint(Unknown Source)
        at javax.swing.RepaintManager$3.run(Unknown Source)
        at javax.swing.RepaintManager$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
        at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
        at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
        at javax.swing.RepaintManager.access$1100(Unknown Source)
        at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$300(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)