From: ko1@... Date: 2020-01-12T18:40:48+00:00 Subject: [ruby-core:96813] [Ruby master Bug#16503] "ret: 2, hash modified during iteration" error in Ruby 2.7.0 Issue #16503 has been updated by ko1 (Koichi Sasada). > This patch should be back-ported for Ruby 2.6. sorry I mean 2.7. 2.6 doesn't have this problem. ---------------------------------------- Bug #16503: "ret: 2, hash modified during iteration" error in Ruby 2.7.0 https://bugs.ruby-lang.org/issues/16503#change-83808 * Author: jnchito (Junichi Ito) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux] (heroku-18 stack) * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- I am running a Rails app on Heroku. After upgrading to Ruby 2.7, I sometimes get `ret: 2, hash modified during iteration` error. The same issue is reported here (I'm using meta-tags gem too): https://github.com/kpumuk/meta-tags/issues/209 This gem deletes elements while iterating hash (HashWithIndifferentAccess actually), so I guess it might involve this error: https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/renderer.rb#L168 https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/renderer.rb#L181 https://github.com/kpumuk/meta-tags/blob/v2.13.0/lib/meta_tags/meta_tags_collection.rb#L85 However, this error does not occur every time (sometimes works, sometimes fails), and it didn't occur in Ruby 2.6. So I'm wondering why. Do you have any idea on this? -- https://bugs.ruby-lang.org/ Unsubscribe: