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dearblue
d94ec9786e
Previously, the identity of the proc object was verified solely based on the identity of irep.
This patch makes the behavior consistent with CRuby.
The reason I noticed this issue was that when adding multiple proc objects with the same irep to a set object, only one was added.
```ruby
p Set.new(Array.new(3) { -> {} }).size
# => 3 (Ruby 4.0)
# => 1 (mruby without this patch)
```
If the block scope is the same, there is only one in CRuby as well.
However, in CRuby, the result of `Proc#to_s` is not affected by the block scope, so it has been changed to be based on the object's address.
The reason no test for `Proc#to_s` was added is that I couldn't determine whether it should be based on `Proc#hash` or the object's address.
```ruby
b = []
t = 3
while t > 0
b << -> {}
t -= 1
end
p Set.new(b).size
# => 1 (Ruby 4.0 and mruby)
p b[0].to_s == b[1].to_s
# => false (Ruby 4.0)
# => true (mruby without this patch)
```