Temporary static arrays on stack get corrupted with dmd -m64

[H. S. Teoh]

On Wed, May 09, 2012 at 11:06:09PM -0700, H. S. Teoh wrote:
> Code (compile with dmd -m64):
> 	import std.stdio;
> 	struct S {
> 		short[4] x;
> 		this(short[4] args...) {
> 			x[] = args[];
> 		}
> 		bool opEquals(in S s) const {
> 			for (auto i=0; i < 4; i++) {
> 				if (this.x[i] != s.x[i])
> 					return false;
> 			}
> 			return true;
> 		}
> 	}
> 	void main() {
> 		assert(S(1,2,3,4) == S(1,2,3,4));
> 	}
> 
> Output: the assertion in main fails. Inserting writeln's indicate that
> the parameter s to opEquals is corrupted (has garbage values). Trying to
> writeln either argument causes a segfault.
> 
> Compiling with -m32 works no problem.
> 
> Is this a known issue?
[...]

Since nobody replied, I opened a new bug:

	http://d.puremagic.com/issues/show_bug.cgi?id=8079

It may be related to bug 5570 perhaps? In any case, this is a
deal-breaker for me, as it makes 64-bit unusable with dmd. I have no
choice but to go back to gdc, but my distro's gdc doesn't work with
2.059 phobos yet, and I need the new regex support. :-(


T

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