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#Date: Sat, 29 Aug 2009 20:04:03 -0700 (PDT)
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#From: Greg Johnson <gregfjohnson@yahoo.com>
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#Subject: bugs in passing uninitialized array to a function
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#To: bug-gawk@gnu.org
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#Content-Type: multipart/mixed; boundary="0-1690489838-1251601443=:68490"
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#X-detected-operating-system: by monty-python.gnu.org: FreeBSD 6.x (1)
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#Status: RO
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#
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#--0-1690489838-1251601443=:68490
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#Content-Type: text/plain; charset=us-ascii
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#
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#I am using gawk version 3.1.7.
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#
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#The attached programs illustrate what look to me like two bugs
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#in the handling of uninitialized variables to functions that treat
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#them as arrays.
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#
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#Greg Johnson
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#
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#
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#
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#--0-1690489838-1251601443=:68490
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#Content-Disposition: attachment; filename="b1"
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# bug? on uninitialized array, length(a) prints as 3, then the loop
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# behaves differently, iterating once. so, length() behaves differently
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# on two calls to the same variable, which was not changed.
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function prt1(a, len)
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{
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print "length: " length(a)
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for (i = 1; i <= length(a); i++)
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printf "<" i "," a[i] "> "
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print "\n"
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}
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BEGIN {
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prt1(zzz)
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}
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#--0-1690489838-1251601443=:68490
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#Content-Type: application/octet-stream; name=b2
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#Content-Disposition: attachment; filename="b2"
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# shouldn't an uninitialized array have length zero?
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# length is printed as 1, and the loop iterates once.
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function prt(a, len)
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{
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len = length(a)
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print "length: " len
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for (i = 1; i <= len; i++)
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printf "<" i "," a[i] "> "
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print "\n"
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}
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BEGIN {
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prt(zzz)
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}
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#--0-1690489838-1251601443=:68490--
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