Cannot use multiple realize function calls with virtual defined resources

added URL to mailinglist thread

The problem here is that the virtual definitions are getting evaluated on the first pass, which means they aren't available for realizing on the next pass. E.g., given this code:

define yay {
    notify { "Testing $name": }
}
@yay { one: }
@yay { two: }
@yay { three: }
realize(Yay["one"])
realize(Yay["two"])

And some debugging, this is what you get:

Realizing Yay[one]
Looking for Yay[one]
["Yay[one]", "Yay[three]", "Yay[two]"]
Realizing Yay[two]
Looking for Yay[two]
["Notify[Testing one]", "Notify[Testing three]", "Notify[Testing two]"]
Could not find Yay[two]
Failed to realize virtual resources Yay[two]

Something is causing all of the defined resources to be evaluated, such that they're converted to the contained resources and are no longer available to 'realize'.

Partially fixed in [cca613d0f142e492aab8cb58087e2a6299334f7d].

That commit seems to have entirely fixed the problem. I can't reproduce any issues around multiple realize calls in different scopes or anything.