https://issues.dlang.org/show_bug.cgi?id=24217

          Issue ID: 24217
           Summary: pragma truncates output at first U+0000 (NUL)
                    character
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: kdevel@vogtner.de

nul1.d:
```d
import std.stdio;

void main ()
{
   enum frag = "\u0000";
   enum s = "string t = \"" ~ frag ~ "\";";
   pragma (msg, s);
   writefln!"s = <%s>" (s);
}
```

$ dmd nul1.d
string t = "
$ ./nul1
s = <string t = "";>
$ ./nul1 | hexdump -c
0000000   s       =       <   s   t   r   i   n   g       t       =
0000010   "  \0   "   ;   >  \n
0000016

reminds me of issue #21480

--