Untyped string variable fails silently. No compiler warning given.

[Gary Willoughby]

Rather nasty bug that silently fails. Linux DMD64 D Compiler 
v2.065

import std.stdio;
import std.array;
import std.conv;
import std.digest.crc;
import std.random;

class Foo
{
	public string generateHash()
	{
		// The following variable is untyped
		// yet no compiler error is thrown.
		text = Random(unpredictableSeed).front.to!(string);

		// text is null here.
		return hexDigest!(CRC32)(text).array.to!(string);
	}
}

void main(string[] args)
{
	auto foo = new Foo();

	writefln("%s", foo.generateHash());
}

Reported: https://d.puremagic.com/issues/show_bug.cgi?id=12357