Multiple initializations of a constant when using pointerof()

[max-codeware]

Considering the following code:

Foo = begin
  puts "Initializing Foo"
end
 
pointerof(Foo)

The outputs is:

Initializing Foo
Initializing Foo

Apparently, when the pointer of a constant is taken, the once_init guard loses track of the initialization status causing multiple initializations.
You can see more in this discussion

[crysbot]

This issue has been mentioned on Crystal Forum. There might be relevant details there:

https://forum.crystal-lang.org/t/is-there-any-optimization-for-constants/5341/21