<code>
char[] foo(char[] str)
{
	return str;
}

char[] foo(char[] str)
{
	return str;
}

void main()
{
	mixin(foo("int bar;"));
}
</code>

test.d(20): function test.foo called with argument types:
        (char[8])
matches both:
        test.foo(char[])
and:
        test.foo(char[])

The message for the run-time evaluated functions is no less weird. Remove mixin(foo("int bar;")); and you get this from the linker: 
Error 1: Previous Definition Different : _D4test3fooFAaZAa