Bundler Quiz!
(Translated from the Japanese article .) This is a quiz about Ruby's Bundler! Add 8 characters to the following Gemfile so that bundle install fails (with non-zero exit code) for the second time or later. source "https://rubygems.org" gemspec Notes: Bundler is a fairly recent version (approximately version 3 or later). The first invocation succeeds. If you find the answer (on your own), please send me a direct message on ruby.social or email, etc.! Wrong Answers An invalid URL like https://rubygems.org12345678 : It doesn't fail since Bundler doesn't refer to the URL. An invalid URL and gems: It fails on the first run. It must fail only on the second or later runs. License Copyright (C) 2026 gemmaro Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without any warranty.