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Re^6: Stupid question (mortalization)by runrig (Abbot) |
on May 11, 2012 at 23:52 UTC ( [id://970118]=note: print w/replies, xml ) | Need Help?? |
Seems like there are just bugs related to altering function arguments, perhaps when they also refer to more global variables, and maybe especially @ARGV. E.g. (copied and modified from bizarre Carp - also I posted a patch in that thread):
I get different results on different versions of perl (tested on 5.8.4, 5.8.8, and 5.14.1). And different results when I comment out the assignment to $ARGV[0]. But passing @ARGV to Main() and then modifying @ARGV (and Getopt::* modules modify @ARGV by default -- so yes @_ should be copied and parsed instead) seems to be a bad thing (bad in that it triggers bugs in perl/Carp, not that you shouldn't be allowed to do it and perl should blow up).
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