Issue #19896 has been reported by HParker (Adam Hess). ---------------------------------------- Bug #19896: Ruby method refinement memory leak https://bugs.ruby-lang.org/issues/19896 * Author: HParker (Adam Hess) * Status: Open * Priority: Normal * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- GitHub pull request: https://github.com/ruby/ruby/pull/8487 When method redefinitions happen, sometimes the final definition does not get cleaned up, Reproducable with the same script from: https://bugs.ruby-lang.org/issues/19894 ``` ruby 10.times do 20_000.times do $c = Class.new do def foo; end end $m = Module.new do refine $c do def foo; end end end Class.new do using $m def initialize o = $c.new o.method(:foo).unbind end end.new end puts `ps -o rss= -p #{$$}` end ``` before: ``` 19792 20944 22224 23504 24784 26064 27344 28624 29776 31056 ``` after: ``` 18560 18560 18560 18560 18560 18560 18560 18560 18560 18560 ``` -- https://bugs.ruby-lang.org/