On Thu, 19 Aug 1999 03:49:19 -0700, Ken wrote:
>
>  The following causes an invalid page fault in Povray for windows versions
>v3.1r1.watcom, v3.1a, and v3.1g.watcom. The same code in Pov v3.01.watcom
>issues an error message that no closing quotes are present at the end of the
>include statement. I also got confirmation that Pov v3.1 for the SunOS compile
>similarly produces an error message instead of an invalid page fault or a
>system crash so it appears to be a windows version related problem.
>
>
>/*** Start of code ***/
>
>#include "colors.inc"
>#include "textures.inc'
>
>/*** End of code ***/


Believe it or not, it's a core problem, but it would be slightly dependent 
on the behavior of the memory management on different compilers or operating
systems.  

For the technically minded, there's a function called Open_Include in 
tokenize.c.  It currently reads like this:

   Include_File_Index++;

   if (Include_File_Index >= MAX_INCLUDE_FILES)
   {
     Include_File_Index--;
     Error ("Too many nested include files.\n");
   }

   temp = Parse_String();


If parsing the string fails, it executes the error routine.  Unfortunately,
that causes POV to try to free all the include file names.  But the last
index hasn't been filled with a name yet.  I fixed this by moving the
Parse_String before the increment, like so:

   temp = Parse_String();

   Include_File_Index++;

   if (Include_File_Index >= MAX_INCLUDE_FILES)
   {
     Include_File_Index--;
     Error ("Too many nested include files.\n");
   }

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