[phobos] build failure in std.file

[Walter Bright]

Walter Bright wrote:
> ..\dmd -c -o- -O -release -nofloat -w -d 
> -Df..\doc\phobos\std_file.html std.ddoc std\file.d
> std\algorithm.d(3200): Error: cast(string)_param_1 is not an lvalue
>

Also fails with simply:

dmd -c std\file.d