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When? Simple: (Score:1)

by Aristotle (5147) <pagaltzis@gmx.de> on 2008.08.29 6:19 (#64652) Homepage Journal

Always.
If you use eval, there has to be a local $@ somewhere nearby. There is no good rule of thumb for where exactly because that depends on the structure of your code. But you have to make sure $@ is restored at some point before execution returns from the scope you are controlling. That is the key: do not pass control back to your caller without fixing $@ if you used eval.

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