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From: Ilya Zakharevich on 31 Mar 2010 19:01
On 2010-03-31, Bo Lindbergh <blgl(a)hagernas.com> wrote:
>> > {
>> > my $strange=-0.0;
>> > print $strange ? "$strange is true\n" : "$strange is false\n";
>> > print $strange ? "$strange is true\n" : "$strange is false\n";
>> > }
>>
>> This is a bug. Read-only access should not change the value.

.... Reading string value of -0.0 changes TRUE/FALSE...

> Would you call this example the same bug, a different bug, or not a bug?
> {
> my $strange="-0";
> print "- $strange == ", -$strange, "\n";
> my $ignored=0+$strange;
> print "- $strange == ", -$strange, "\n";
> }

.... Reading NUM value of "-0" changes the effect of unary minus.

It looks like different bugs - but they may have the same fix.... ;-)

> Ditto for this one.
> {
> my($one,$two)=("12","21");
> print "$one | $two == ", $one | $two, "\n";
> my $ignored=$one+$two;
> print "$one | $two == ", $one | $two, "\n";
> }

Not a bug - just a documented brokenness of |-operator...

Hope this helps,
Ilya
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