You're right; I've since realized that what this code should do is 

if (my @bad = grep { /^(dualvar|set_prototype)$/ } @_ ) { ... }

[download]

And then give @bad in the error message. (This'll give a bogusly redundant list if the import spec of Scalar::Util contains bogus redundancies, but I doubt that's a problem.)

Anyway there's now a bug in the RT queue for this distro with the correct fix in it.

In reply to Re^2: "Can't happen" bugs by gaal
in thread "Can't happen" bugs by gaal

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