This is not a bug.
http://www.gnu.org/manual/gawk/gawk.html#Floating-Point-Issues
It is important to note that the string value for a number may not
reflect the full value (all the digits) that the numeric value actually
contains. The following program (values.awk) illustrates this:
{
$1 = $2 + $3
# see it for what it is
printf("$1 = %.12g\n", $1)
# use CONVFMT
a = "<" $1 ">"
print "a =", a
# use OFMT
print "$1 =", $1
}
This program shows the full value of the sum of $2 and $3 using printf,
and then prints the string values obtained from both automatic
conversion (via CONVFMT) and from printing (via OFMT).
Here is what happens when the program is run:
$ echo 2 3.654321 1.2345678 | awk -f values.awk
-| $1 = 4.8888888
-| a = <4.88889>
-| $1 = 4.88889
This makes it clear that the full numeric value is different from what
the default string representations show.
** Changed in: gawk (Ubuntu)
Status: New => Invalid
--
The == operator doesn't work appropriately
https://bugs.launchpad.net/bugs/304125
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