Build : 'O'
OS : 5.5.1 (8bit) (ok in 5.6 [8/24bit] & Win95 & WinNT)
app : demos.Fonts.Tree

Enabling Alpha causes fonts to appear illegable. Sometimes like inversion video. Beyond that...it SEGV's.

Steps to repo:
  1. Launch Java2Demo /usr/local/java/jdk1.2/solaris/demo/jfc/Java2D
  2. goto Fonts tab
  3. Dblclick on Tree
  4. enable Alpha (may have to enable/disable few times to SEGV)

SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_MAPERR [addr: 0x10]

        stackpointer=eeb02a9c

Full thread dump Classic VM (Java2DFCS:23-Oct-98@05:53, native threads):
    "TreeDemo" (TID:0xeb089918, sys_thread_t:0xbcff30, state:CW, native ID:0x2f) prio=1
        at java.lang.Thread.sleep(Native Method)
        at DemoSurface.run(Compiled Code)
        at java.lang.Thread.run(Compiled Code)
    "PerformanceMonitor" (TID:0xeb04cf30, sys_thread_t:0x6f0b50, state:CW, native ID:0x2a) prio=1
        at java.lang.Thread.sleep(Native Method)
        at PerformanceMonitor$MonitorComponent.run(Compiled Code)
        at java.lang.Thread.run(Compiled Code)
    "MemoryMonitor" (TID:0xeb04ebd0, sys_thread_t:0xa87400, state:CW, native ID:0x29) prio=1
        at java.lang.Thread.sleep(Native Method)
        at MemoryMonitor$MonitorComponent.run(Compiled Code)
        at java.lang.Thread.run(Compiled Code)
    "Thread-5" (TID:0xeb0670b8, sys_thread_t:0x2ebc0, state:CW, native ID:0x1) prio=5
    "TimerQueue" (TID:0xeb09f0a0, sys_thread_t:0x63eb48, state:CW, native ID:0x10) prio=5
        at java.lang.Object.wait(Native Method)
        at javax.swing.TimerQueue.run(Compiled Code)
        at java.lang.Thread.run(Compiled Code)
    "AWT-Finalizer" (TID:0xeb0b6100, sys_thread_t:0x5650c0, state:CW, native ID:0xb) prio=9
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Compiled Code)
        at sun.awt.AWTFinalizer.run(Compiled Code)
    "Screen Updater" (TID:0xeb09a318, sys_thread_t:0x4fdc70, state:CW, native ID:0xa) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Compiled Code)
        at sun.awt.ScreenUpdater.nextEntry(Compiled Code)
        at sun.awt.ScreenUpdater.run(Compiled Code)
    "AWT-Motif" (TID:0xeb0b1f38, sys_thread_t:0x360528, state:MW, native ID:0x9) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Compiled Code)
    "SunToolkit.PostEventQueue-0" (TID:0xeb0b23b0, sys_thread_t:0x32beb0, state:CW, native ID:0x8) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Compiled Code)
        at sun.awt.PostEventQueue.run(Compiled Code)
    "AWT-EventQueue-0" (TID:0xeb0b2360, sys_thread_t:0x32bd98, state:R, native ID:0x7) prio=6
        at sun.awt.font.NativeFontWrapper.drawGlyphVectorIndexed(Native Method)
        at sun.java2d.loops.drawGlyphVectorIndexed.DrawGlyphVector(Compiled Code)
        at sun.java2d.loops.RasterOutputManager.drawGlyphVector(Compiled Code)
        at sun.awt.image.BufferedImageGraphics2D.drawGlyphVector(Compiled Code)
        at sun.java2d.pipe.ValidatePipe.drawGlyphVector(Compiled Code)
        at sun.java2d.SunGraphics2D.drawGlyphVector(Compiled Code)
        at sun.awt.font.ExtendedTextSourceLabel.draw(Compiled Code)
        at sun.awt.font.ExtendedTextLabelComponent.handleDraw(Compiled Code)
        at sun.awt.font.TextLineComponent.drawTextAndEmbellishments(Compiled Code)
        at sun.awt.font.TextLineComponent.draw(Compiled Code)
        at java.awt.font.TextLine.draw(Compiled Code)
        at java.awt.font.TextLayout.draw(Compiled Code)
        at demos.Fonts.Tree.tree(Compiled Code)
        at demos.Fonts.Tree.drawDemo(Compiled Code)
        at DemoSurface.paint(Compiled Code)
        at javax.swing.JComponent.paintWithBuffer(Compiled Code)
        at javax.swing.JComponent._paintImmediately(Compiled Code)
        at javax.swing.JComponent.paintImmediately(Compiled Code)
        at javax.swing.RepaintManager.paintDirtyRegions(Compiled Code)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Compiled Code)
        ... (more frames not shown)
    "Finalizer" (TID:0xeb098320, sys_thread_t:0x6dae0, state:CW, native ID:0x6) prio=8
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(Compiled Code)
        at java.lang.ref.ReferenceQueue.remove(Compiled Code)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:174)
    "Reference Handler" (TID:0xeb0983b0, sys_thread_t:0x6bfc8, state:CW, native ID:0x5) prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Compiled Code)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:114)
    "Signal dispatcher" (TID:0xeb0983e0, sys_thread_t:0x63a48, state:CW, native ID:0x4) prio=5
Monitor Cache Dump:
    javax.swing.TimerQueue@EB09F8F0/EB4337F0: <unowned>
        Waiting to be notified:
            "TimerQueue" (0x63eb48)
    java.lang.ref.ReferenceQueue$Lock@EB098338/EB0CDD50: <unowned>
        Waiting to be notified:
            "Finalizer" (0x6dae0)
    sun.awt.ScreenUpdater@EB09A318/EB171CC0: <unowned>
        Waiting to be notified:
            "Screen Updater" (0x4fdc70)
    sun.awt.PostEventQueue@EB0B23B0/EB0F3210: <unowned>
        Waiting to be notified:
            "SunToolkit.PostEventQueue-0" (0x32beb0)
    sun.awt.AWTFinalizer@EB0B6100/EB1446A0: <unowned>
        Waiting to be notified:
            "AWT-Finalizer" (0x5650c0)
    java.lang.Class@EB0A6E20/EB1184B8: owner "AWT-EventQueue-0" (0x32bd98) 2 entries
        Waiting to enter:
            "AWT-Motif" (0x360528)
    java.lang.ref.Reference$Lock@EB0983C0/EB0CD890: <unowned>
        Waiting to be notified:
            "Reference Handler" (0x6bfc8)
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "AWT-EventQueue-0" (0x32bd98) 1 entry
    Thread queue lock: owner "AWT-EventQueue-0" (0x32bd98) 1 entry
        Waiting to be notified:
            "Thread-5" (0x2ebc0)
    Monitor registry: owner "AWT-EventQueue-0" (0x32bd98) 1 entry