[Issue 22595] New: Error: integer constant expression expected instead of `"Hello!\x0a"`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22595

          Issue ID: 22595
           Summary: Error: integer constant expression expected instead of
                    `"Hello!\x0a"`
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: rempas at tutanota.com

I'm trying to compile the following code:

```
extern (C) void _start() {
  const char* hello = "Hello!\n";
  ulong len = 7;

  asm {
    mov RAX, 1;
    mov RDI, 1;
    mov RSI, hello;
    mov RDX, len;
    syscall;
  };

  asm {
    mov RAX, 60;
    mov RDI, 0;
    syscall;
  };
}
```

and I am using the following command:
`dmd test.d -betterC -Xcc="-nostdlib" -O -of=testd`

This will compile normally if I use ldc2 but with dmd, it will give me
the error message in the title. If I change `const char*` to `char*`
(of course I will also have to cast the string literal) then it will
compile normally. Any ideas? It doesn't make sense for this to be the
behavior right?

--