--- util/texindex.c.orig        2007-01-05 10:43:57.000000000 -0800
+++ util/texindex.c     2007-01-05 10:42:42.000000000 -0800
@@ -836,8 +836,8 @@
       if (p == end)
         {
           buffer = (char *) xrealloc (buffer, linebuffer->size *= 2);
-          p += buffer - linebuffer->buffer;
-          end += buffer - linebuffer->buffer;
+         p = buffer + (p - linebuffer->buffer);
+          end = buffer + linebuffer->size;
           linebuffer->buffer = buffer;
         }
       if (c < 0 || c == '\n')