[Issue 18962] New: readln() removes all '\r' characters from stdin

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18962

          Issue ID: 18962
           Summary: readln() removes all '\r' characters from stdin
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: laurent.treguier.sink at gmail.com

import std.conv;
import std.stdio;

void main()
{
    auto line = readln();
    while (!stdin.eof)
    {
        auto res = stdin.rawRead(new char[1]);

        if (res.length)
        {
            stdout.writeln(res[0].to!int);
        }
    }
}
------------------------
This code will remove any '\r' character coming from stdin. Using any file with
CRLF line endings as input, the LF part will be outputed (as its ascii code
10), but not the CR part.
Commenting the `auto line = readln();` line makes `stdin.rawRead()` read '\r'
characters properly; the CR part will be outputed (as its ascii code 13).
This doesn't seem to occur on Linux.

DMD and Phobos version : 2.080.1

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