Hi,
> I was trying to implement a breadth first search where I would mutate the
> search queue while iterating through it. Simplified, it was something like
> this:
>
> numbers = [1, 2, 3, 4]
> numbers.each { |number|
> numbers << (1+number) unless number > 3
> puts number
> }
Modifying the object you're iterating on is undefined behavior, even in Ruby:
http://www.ruby-forum.com/topic/188211#821599
It's generally easy to modify your code to either iterate on a copy of
the array or looping with an index (numbers.length.times {...} or i =
0; while i < numbers.length; ..; end depending on what you want to
do).
> Also, is this type of exception one that should be caught by the VM and
> propagated as a normal Ruby Exception that I could rescue?
It should definitively be propagated as a normal Ruby exception. Could
you file a ticket on trac for that?
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