GDC doesn't catch this ambiguity

[Mike]

On Saturday, 11 January 2014 at 00:45:20 UTC, Mike wrote:
> In the following code:
>
> module trace;
>
> private nothrow pure void SendCommand(in int command, in void*
> message)
> {
>      asm
>      {
> 	"mov r0, %[cmd];
> 	mov r1, %[msg];
> 	bkpt #0xAB"
> 	:
> 	: [cmd] "r" command, [msg] "r" message
> 	: "r0", "r1";
>      };
> }
>
> private static nothrow pure void SendMessage(in void* ptr, in
> uint length)
> {
>      // Create semihosting message message
>      uint[3] message =
>      [
> 	2, 	          // stderr
> 	cast(uint)ptr,    // ptr to string
> 	length            // size of string
>      ];
>
>      // Send semihosting command
>      SendCommand(0x05, &message);
> }
>
> struct Trace
> {
>      static nothrow pure void Write(in string text)
>      {
> 	SendMessage(text.ptr, text.length);
>      }
>
>      static nothrow pure void Write(uint value)
>      {
> 	char[32] buffer;
> 	
> 	char* p = buffer.ptr + 31;
> 	do
> 	{
> 	    p--;
> 	    *p = '0' + (value % 10);
> 	    value /= 10;
> 	} while(value > 0);
>
> 	SendMessage(p, (buffer.ptr + 31) - p);
>      }
>
>      static nothrow pure void Write(A...)(A a)
>      {
> 	foreach(t; a)
> 	{
> 	    Write(t);
> 	}
>      }
>
>      static nothrow pure void WriteLine(A...)(A a)
>      {
> 	foreach(t; a)
> 	{
> 	    Write(t);
> 	}
> 	Write("\r\n");
>      }
> }
>
> GDC doesn't catch the ambiguity between...
>    static nothrow pure void Write(A...)(A a)
>      and
>    static nothrow pure void Write(in string text)
> ... but LDC does.
>
> Who's right?

LDC
the LLVM D compiler (0.12.1):
   based on DMD v2.063.2 and LLVM 3.3

GDC
arm-none-eabi-gdc (GCC) 4.8.2
Copyright (C) 2013 Free Software Foundation, Inc.

Also, is there a way to know which version of DMD GDC is based on?