1269 – Compiler crash on assigning to an element of a void-initialized array in CTFE

import std.string;
const uint VERSION_MAJOR = 0,
 VERSION_MINOR = 10,
 VERSION_PATCH = 2;
const char[]	VERSION_STRING = "Ddbg "~.toString(VERSION_MAJOR)~"."~(VERSION_MINOR>9?"":"0")~.toString(VERSION_MINOR)
 ~(VERSION_PATCH>0?"."~.toString(VERSION_PATCH):"")~" beta";
void main() {}

Brought it down to this, nothing to do with strings but rather with the attempted and failing CTFE of toString (here simplified and renamed f):
int f() {
	// this also causes the crash:
	// int[] a = void;
	int[1] a = void;
	a[0] = 1;
	return 1;
}
const i = f();
It's probably dependent on Issue 1254, but they're subtly different so I won't set it as a dependency.

Fixed in DMD 1.017.