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last edited 16 years ago by kratt6 |
Edit detail for #375 A simple stream generation enters an infinite loop revision 2 of 5
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Editor: kratt6
Time: 2007/12/20 02:14:43 GMT-8 |
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From kratt6 Thu Dec 20 02:14:43 -0800 2007
From: kratt6
Date: Thu, 20 Dec 2007 02:14:43 -0800
Subject:
Message-ID: <20071220021443-0800@axiom-wiki.newsynthesis.org>
Category: Axiom on Linux => Axiom Library
An interesting bug. When you type [i for i in 1.. | prime?(i)]? everything works fine. There is infinite number of primes so no problem. However, try this: [i for i in -5 .. | zero?(i)]?
Clearly there is only one zero. The command seems to attempt to find at least ten zeros before exiting. It seems to me that this sort of set generation does not even check if there is only a finite number of elements in the set or if the set is infinite. In the case when the number of instances satisfying the condition is less than 10 the program will choke and enter an infinite loop.