I have the following code in an application (where pfxlen already has been
set to 4):
pfx = ""
do pfxlen
pfx ||= xrange("00"x,"7F"x)~substr(random(1,127),1)
end
But when I run the application, pfx is always generated with the same
value: BNB" or '424E4222'x - but it should be random!
To debug this I lifted this code snippet to a test program, adding pfxlen=4
as the first instruction, and then pfx gets different values each time, as
expected.
When I do a 'trace i' I can see that random(...) is returning the same
value sequence each time when running the code in the application: 67, 79,
67, 35. When I run the test program it always returns different values.
OK, so I change the program to this:
pfx = ""
do pfxlen
rand = random(1,127)
pfx ||= xrange("00"x,"7F"x)~substr(rand,1)
end
No change, the same values are returned. So then I try this:
pfx = ""
do pfxlen
say random(1,127)
pfx ||= xrange("00"x,"7F"x)~substr(random(1,127),1)
end
Now pfx gets the value N";* ('4E223B2A'x) but also now it gets the same
value EVERY time.
I can only conclude that there must be a bug in the random() function that
seems to introduce a seed on its own under certain circumstances, is that
possible? I cannot explain this behaviour in any other way.
Staffan
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