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Meanwhile, the behavior of trace() on a 1-byte > struct is poorly defined. Users wishing clear semantics should use > print() or other actions. This makes trace() much, much less useful. I'd say NAK, if this means we're going to not come up with any useful behaviour. Why not define something, then use it? Nobody is going to say "look at the size of something and then do a print() rather than a trace() if it's too small". Even looking at this commit I'm not sure what "too small" is (one byte? four bytes? sizeof(int)? sizeof(long)? A cacheline? what?) so I don't see how our users can be expected to.