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Author: rmhj Big gold star, 5000 posts Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 1648  
Subject: Re: Rare bird Date: 12/12/2011 12:32 AM
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crassfool: You likely know how it is. You get a bug that you can't understand, that makes no sense at all, where the computer goes all haywire when your code is simple, straightforward, and everyone who looks at it says it's right. Might be a compiler bug, right? But if you come right out and call it that, somebody will immediately prove that it's not, it's an error on your part, and you're humiliated.

I've seen probably more than my share of compiler bugs, but I'd do more testing before I was sure. It has probably been close to twenty years since I found a real one in an optimizer. In that case, the compiler did an invalid tail-recursion optimization. Shared storage between caller and callee (an array) made the optimization invalid, but it only blew up rarely (SMTP in my case).

Particularly, I'd be confirming that the code is actually wrong in the structure access. That sounds like a too-well-known, too-critical location for a bug like that. There are lots of other subtle ways this could go wrong.

rj
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