From: sean@... Date: 2021-08-07T00:03:28+00:00 Subject: [ruby-core:104817] [Ruby master Bug#18065] 3.0.2 - possible memory leak in Hash#transform_keys! Issue #18065 has been reported by sean@duke.edu (Sean Dilda). ---------------------------------------- Bug #18065: 3.0.2 - possible memory leak in Hash#transform_keys! https://bugs.ruby-lang.org/issues/18065 * Author: sean@duke.edu (Sean Dilda) * Status: Open * Priority: Normal * ruby -v: ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux] * Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- I found what may be a memory leak in Hash#transform_keys! in version 3.0.2 This sample code will reproduce the issue. It quickly consumes gigabytes of memory when running on 3.0.2, but has very normal memory usage on 3.0.1. I tested using the ruby:3.0.2 docker image. ```ruby h = { value1: 1, value2: 2 } loop { h.transform_keys!(&:to_s) } ``` The issue doesn't appear if there is only one key in the hash. -- https://bugs.ruby-lang.org/ Unsubscribe: