why static array can be reassigned with new allocation?

[mw]

Hi,

``` static_array.d
import std.stdio;

void main() {
	int[3] arr;
	writeln(arr);
	arr = new int[5];
	writeln(arr);
}


$ dmd static_array.d
$ ./static_array
[0, 0, 0]
core.exception.RangeError at static_array.d(6): Range violation
----------------
??:? _d_arrayboundsp [0x55e4830afcb5]
??:? _Dmain [0x55e48308f957]


$ ldc2 static_array.d
$ ./static_array
[0, 0, 0]
Illegal instruction (core dumped)

```

Why this code can be compiled and causing runtime error? it 
should be caught at compile time!