The attached tiny patch will fix the problem Greg Sabino Mullane had
with a shared lexical $_TD, by making it a global and just pushing a
local value in the trigger function.
I don't think what we had is strictly a bug, so I don't thinbk we need
top backpatch this.
It will, however, require use of perl 5.6 at a minimum, because that's
when the "our" function came in. Since that was over 6 years ago, I
think this is not unreasonable. If there are squawks, I have another
slightly longer and slightly more old-fashioned way to do the same
thing, but this is the best modern way.
I don't think a docs change is needed.
If there's no objection I will apply thin in a few days.
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