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#Date: Sat, 29 Aug 2009 20:04:03 -0700 (PDT)
#From: Greg Johnson <gregfjohnson@yahoo.com>
#Subject: bugs in passing uninitialized array to a function
#To: bug-gawk@gnu.org
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#
#--0-1690489838-1251601443=:68490
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#
#I am using gawk version 3.1.7.
#
#The attached programs illustrate what look to me like two bugs
#in the handling of uninitialized variables to functions that treat
#them as arrays.
#
#Greg Johnson
#
#
#
#--0-1690489838-1251601443=:68490
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# bug? on uninitialized array, length(a) prints as 3, then the loop
# behaves differently, iterating once. so, length() behaves differently
# on two calls to the same variable, which was not changed.
function prt1(a, len)
{
print "length: " length(a)
for (i = 1; i <= length(a); i++)
printf "<" i "," a[i] "> "
print "\n"
}
BEGIN {
prt1(zzz)
}
#--0-1690489838-1251601443=:68490
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# shouldn't an uninitialized array have length zero?
# length is printed as 1, and the loop iterates once.
function prt(a, len)
{
len = length(a)
print "length: " len
for (i = 1; i <= len; i++)
printf "<" i "," a[i] "> "
print "\n"
}
BEGIN {
prt(zzz)
}
#--0-1690489838-1251601443=:68490--