Issue #20463 has been updated by hsbt (Hiroshi SHIBATA). Status changed from Open to Closed It's known issue. see https://bugs.ruby-lang.org/issues/20450#note-9 ---------------------------------------- Bug #20463: Ruby fails to generate warning for require syslog https://bugs.ruby-lang.org/issues/20463#change-108159 * Author: tyatin (Serg Tyatin) * Status: Closed * ruby -v: 3.3.1 * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- ``` docker run -it ruby:3.3.1 bash touch Gemfile bundle bundle exec ruby -e "require '/usr/local/lib/ruby/3.3.0/x86_64-linux/syslog'" /usr/local/lib/ruby/3.3.0/bundled_gems.rb:130:in `<': comparison of String with nil failed (ArgumentError) msg = " #{RUBY_VERSION < SINCE[gem] ? "will no longer be" : "is not"} part of the default gems since Ruby #{SINCE[gem]}." ^^^^^^^^^^ from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:130:in `build_message' from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:126:in `warning?' from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:71:in `block (2 levels) in replace_require' from -e:1:in `<main>' ``` the same happens on M1 mac -- https://bugs.ruby-lang.org/