Bug #15503: Error in Ruby 2.6 when trying to shell out to invoke `irb` while in a `bundle exec` session

• Status: Third Party's Issue
• Assignee: hsbt (Hiroshi SHIBATA)
• Target version: -
• ruby -v: ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-darwin17]
• Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN

[schneems (Richard Schneeman)]

Hello. This script fails on Ruby 2.6 but works successfully with Ruby 2.5:

cd /tmp
mkdir irb-issue
cd irb-issue
chruby 2.6
echo 'source "https://rubygems.org"' > Gemfile
bundle install
bundle exec ruby -e 'puts `echo "1 + 1" | irb --simple-prompt`'

Here is the failure:

$ bundle exec ruby -e 'puts `echo "1 + 1" | irb --simple-prompt`'
Traceback (most recent call last):
	2: from /Users/rschneeman/.gem/ruby/2.6.0/bin/irb:23:in `<main>'
	1: from /Users/rschneeman/.rubies/ruby-2.6.0/lib/ruby/2.6.0/bundler/rubygems_integration.rb:482:in `block in replace_bin_path'
/Users/rschneeman/.rubies/ruby-2.6.0/lib/ruby/2.6.0/bundler/rubygems_integration.rb:462:in `block in replace_bin_path': can't find executable irb for gem irb. irb is not currently included in the bundle, perhaps you meant to add it to your Gemfile? (Gem::Exception)

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned
• Assignee set to hsbt (Hiroshi SHIBATA)

[segiddins (Samuel Giddins)]

schneems (Richard Schneeman) wrote:

Hello. This script fails on Ruby 2.6 but works successfully with Ruby 2.5:

I believe that's because irb was not a gem in Ruby 2.5 and was part of the stdlib, but in 2.6 it's a gem.

[deivid (David Rodríguez)]

I proposed a fix for this issue to the bundler repo in https://github.com/bundler/bundler/pull/6963.

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Third Party's Issue