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Bug #19164

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[3.2.0dev] Freezing an object can prevent removing methods on its class

Added by byroot (Jean Boussier) over 1 year ago. Updated over 1 year ago.

Status:
Closed
Assignee:
-
Target version:
ruby -v:
ruby 3.2.0dev (2022-11-30T08:20:38Z master c8bfbbc25e) [arm64-darwin22]
[ruby-core:111116]

Description

The following snippet showcase the bug. It passes on 3.1 and older, but fails on 3.2.0

klass = Class.new
klass.prepend(Module.new)

klass.new.freeze
klass.define_method(:bar) {} # works
klass.remove_method(:bar) # raise FrozenError

Bisecting with this script points me to e7b1ff984fde859a7778dec564731eb79392406f, which suggest some part of the codebase might be misusing some user flags.

I have a patch that fix this script but I doubt it's the right fix, I'll be working with @jemmai (Jemma Issroff) and @tenderlovemaking (Aaron Patterson) to find a proper fix.

I'm opening this ticket to make sure it's addressed before the 3.2.0 final release.


Related issues 1 (0 open1 closed)

Related to Ruby master - Bug #19166: Module#remove_method can change frozen modules when there is a prepended moduleClosedActions
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