https://issues.dlang.org/show_bug.cgi?id=21000

          Issue ID: 21000
           Summary: -preview=nosharedaccess precludes use of
                    stdin,stdout,stderr
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Other
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: bcarneal11@gmail.com

import std.stdio;

void main() { writeln("Hello world!");

Compilation of the above with -preview=nosharedaccess fails.  The three error messages, one each for stdin, stdout and stderr, look like this:

/dlang/dmd/linux/bin64/../../src/phobos/std/stdio.d-mixin-4841(4841): Error: direct access to shared stdin is not allowed, see core.atomic


In the current stdio.d, the offending mixin is at line 4858 within the property template named "makeGlobal".

The fix may be as simple as a cast at that location.

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