Bug #19341: Write cache issue with class variables

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED

[luke-gru (Luke Gruber)]

class SetCvar
  def self.set(val)
    @@a = val # inline cache
  end
end

def test_set_cvar_on_frozen_object
  SetCvar.set(1) # fill write cache
  SetCvar.freeze
  SetCvar.set(2) # hit write cache, but should check frozen status
end

test_set_cvar_on_frozen_object()

PR Here: https://github.com/ruby/ruby/pull/7124

[peterzhu2118 (Peter Zhu)]

• Backport changed from 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN to 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED

[luke-gru (Luke Gruber)]

• Status changed from Open to Closed

Applied in changeset git|f66804e6f78ed4cf81896d2256743a820b05939a.

---

don't allow setting class variable on module that's frozen [Bug #19341]

[naruse (Yui NARUSE)]

This breaks CI on ruby_3_2 branch https://github.com/nurse/ruby/commit/ec9a6ae3f6961b0ece1a6fc67ea26033ee91498e