Comment # 1 on bug 1204481 from Marcus Meissner

testcase is super simple:

zypper -n in --recommends -C "rubygem(rails)"
rails new mycoolapp --skip-bundle --skip-test
cd mycoolapp
(rails server -b 0.0.0.0 &)
for i in {1..100} ; do sleep 0.1; curl -s http://localhost:3000 | grep
"<title>Ruby on Rails" && break ; done
pkill -f "rails server" || pumactl -P tmp/pids/server.pid stop


the rails server start up fails with:
(rails server -b 0.0.0.0 &) 
Could not find gem 'puma (~> 3.11)' in any of the gem sources listed in your
Gemfile.
Run `bundle install` to install missing gems.


I have however installed ruby2.5-rubygem-puma-4.3.12-150000.3.9.1.x86_64