Bug #21330: Namespace: Class and Module frozen status is not namespaced

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[byroot (Jean Boussier)]

File.write("/tmp/test.rb", <<~'RUBY')
  Hash.freeze
RUBY

ns = Namespace.new
ns.require("/tmp/test.rb")

class Hash
  def monkey_patch
  end
end

Expected behavior:

Since the monkey patch is in a different namespace, I'd expect it to not impact code that is running in another namespace.

Actual behavior:

test.rb:9:in '<class:Hash>': can't modify frozen class: Hash (FrozenError)

The class is frozen globally, breaking code in other namespaces.

Is this by design, or does that mean the frozen status need to be moved in the classext_t as well?

cc @tagomoris (Satoshi Tagomori)

[byroot (Jean Boussier)]

• Subject changed from Namespace: Class and Module frozen status is not namespace to Namespace: Class and Module frozen status is not namespaced

[tagomoris (Satoshi Tagomori)]

The frozen flag is what I missed. I think we should move the flag to rb_classext_t.