https://issues.dlang.org/show_bug.cgi?id=24681

          Issue ID: 24681
           Summary: rawWrite on closed File and closed pipe segfault
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: kdevel@vogtner.de

related: #21728, #21729

segfpipe.d
```
import std.stdio;
import std.process;

void main ()
{
   auto p = pipe ();
   p.writeEnd.close ();
   p.writeEnd.rawWrite ("test");
}
```

segffile.d
```
import std.stdio;
import std.file;

void main ()
{
   auto f = File ("/dev/null");
   f.close ();
   f.rawWrite ("test");
}
```

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