1810 – MmFile anonymous mapping does not work under win32

Sample code:
import std.mmfile, std.stdio;
void main() {
 auto test = new MmFile(null, MmFile.Mode.ReadWriteNew, 1024*1024, null);
 writefln("Done");
}
The problem:
"Error: : The system cannot find the path specified."
It looks like the MmFile code tries to open the null as a file and fails; however, the spec says that null as a filename creates an anonymous mapping.
Reference: http://digitalmars.com/d/1.0/phobos/std_mmfile.html
Since my StackThreads implementation relies on memory-mapped files for stack memory, this completely breaks my code under win32. A solution would be greatly appreciated.
 --downs

Created attachment 224 [details] 
Add code to handle the filename=null case

Created attachment 225 [details] 
Added code to handle a null hFile in the destructor

Fixed dmd 1.028 and 2.012