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use encoding makes my head hurt

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From:
Nicholas Clark
Date:
January 23, 2004 09:44
Subject:
use encoding makes my head hurt
Message ID:
20040123174342.GN12426@plum.flirble.org
I can see the uses for this pragma, but its strange side effects make my head
hurt:

./perl -Ilib -Mencoding=big-5 -lwe '$a = pack("C*", 0xA4, 0x40); print  length $a; $a .= ""; print length $a'
2
1

Nicholas Clark
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