Bug 7846

Open http://silversoft.net/docs/iso14882-C++98.pdf in xpdf 3.00-alt5pl3.
Click on "AAA00025.pdf" in the contents tree (it's the root of the tree).
xpdf crashes:

(gdb) bt
#0  0x080bae2b in ?? ()
#1  0x00000001 in ?? ()
#2  0x4037de57 in XtStrings () from /usr/X11R6/lib/libXt.so.6
#3  0xbfc2a8e8 in ?? ()
#4  0x4033c2d1 in XtFree () from /usr/X11R6/lib/libXt.so.6
#5  0x080c1028 in ?? ()
#6  0x0817b470 in ?? ()
#7  0x00000000 in ?? ()
#8  0xbfc2a970 in ?? ()
#9  0x00000000 in ?? ()
#10 0x08242ea0 in ?? ()
#11 0x4037f6cc in ?? () from /usr/X11R6/lib/libXt.so.6
#12 0xbfc2a9a8 in ?? ()
#13 0x4033c851 in XtCallCallbackList () from /usr/X11R6/lib/libXt.so.6
#14 0x4033c851 in XtCallCallbackList () from /usr/X11R6/lib/libXt.so.6
#15 0x080bd362 in ?? ()
#16 0x0817b1d8 in ?? ()
#17 0x0817b460 in ?? ()
#18 0xbfc2a9e0 in ?? ()
#19 0x00000000 in ?? ()
#20 0x00000000 in ?? ()
#21 0xbfc2ae80 in ?? ()
#22 0xbfc2a9e8 in ?? ()
#23 0x403478ae in _XtGetPerDisplay () from /usr/X11R6/lib/libXt.so.6
#24 0x40372e47 in _XtMatchAtom () from /usr/X11R6/lib/libXt.so.6
#25 0x40373441 in _XtMatchAtom () from /usr/X11R6/lib/libXt.so.6
#26 0x40373bcc in _XtTranslateEvent () from /usr/X11R6/lib/libXt.so.6
#27 0x4034b37a in XtDispatchEventToWidget () from /usr/X11R6/lib/libXt.so.6
#28 0x4034bc4c in _XtOnGrabList () from /usr/X11R6/lib/libXt.so.6
#29 0x4034be94 in XtDispatchEvent () from /usr/X11R6/lib/libXt.so.6
#30 0x4034c3e4 in XtAppMainLoop () from /usr/X11R6/lib/libXt.so.6
#31 0x080c8d70 in ?? ()
#32 0x081283b8 in ?? ()
#33 0x08124fe0 in ?? ()
#34 0x00000001 in ?? ()
#35 0x00000000 in ?? ()
#36 0x00000000 in ?? ()
#37 0x080f99d0 in ?? ()
#38 0xbfc2af28 in ?? ()
#39 0x0804b179 in _init ()
#40 0x405a949e in __libc_start_main () from /lib/libc.so.6
#41 0x0804c0a1 in ?? ()