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Date: Fri, 19 Dec 2025 13:35:21 +0100
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Subject: bundle installs hangs with ruby 3.4.7
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From: Daniel Abrahamsson via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Daniel Abrahamsson <daniel DOT abrahamsson AT prover DOT com>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi,

I have a problem with `bundle install` hanging with ruby 3.4.7. 
Downgrading to 3.2.2 solves the problem.

Here is my Gemfile:

----
source 'https://rubygems.org'

gem 'asciidoctor', '2.0.23'
gem 'asciidoctor-bibtex', '0.9.0'
gem 'asciimath', '2.0.5'
gem 'coderay', '1.1.3'
gem 'rouge', '4.3.0'
gem 'asciidoctor-diagram', '2.3.1'
gem 'pygments.rb', '0.6.3'
gem 'text-hyphen', '1.5.0'
gem 'asciidoctor-pdf', '2.3.17'

----

Here are the commands I run:

$ bundle config set --local path '_ruby-deps'
$ bundle install --verbose

If I try to cancel the installation with Ctrl+C, it shows a backtrace, 
but continues to run. If I press Ctrl+C again it shows the backtrace 
again. After that, it just hangs and I have to force kill the ruby 
process). Here is the backtrace:

----
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/worker.rb:108:in 
'block in Bundler::Worker#add_interrupt_handler'
<internal:thread_sync>:18:in 'Thread::Queue#pop'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/worker.rb:42:in 
'Bundler::Worker#deq'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer/parallel_installer.rb:174:in 
'Bundler::ParallelInstaller#process_specs'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer/parallel_installer.rb:134:in 
'Bundler::ParallelInstaller#install_with_worker'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer/parallel_installer.rb:89:in 
'Bundler::ParallelInstaller#call'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer/parallel_installer.rb:67:in 
'Bundler::ParallelInstaller.call'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer.rb:244:in 
'Bundler::Installer#install_in_parallel'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer.rb:201:in 
'Bundler::Installer#install'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer.rb:89:in 
'block in Bundler::Installer#run'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/process_lock.rb:12:in 
'block in Bundler::ProcessLock.lock'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/process_lock.rb:9:in 
'IO.open'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/process_lock.rb:9:in 
'Bundler::ProcessLock.lock'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer.rb:71:in 
'Bundler::Installer#run'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/installer.rb:23:in 
'Bundler::Installer.install'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/cli/install.rb:62:in 
'Bundler::CLI::Install#run'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/cli.rb:261:in 
'block in Bundler::CLI#install'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/settings.rb:131:in 
'Bundler::Settings#temporary'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/cli.rb:260:in 
'Bundler::CLI#install'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/vendor/thor/lib/thor/command.rb:27:in 
'Bundler::Thor::Command#run'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in 
'Bundler::Thor::Invocation#invoke_command'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/vendor/thor/lib/thor.rb:392:in 
'Bundler::Thor.dispatch'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/cli.rb:34:in 
'Bundler::CLI.dispatch'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/vendor/thor/lib/thor/base.rb:485:in 
'Bundler::Thor::Base::ClassMethods#start'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/cli.rb:28:in 
'Bundler::CLI.start'
/usr/bin/bundle:28:in 'block in <main>'
/home/daab/test/_ruby-deps/ruby/3.4.0/gems/bundler-2.4.10/lib/bundler/friendly_errors.rb:117:in 
'Bundler.with_friendly_errors'
/usr/bin/bundle:20:in '<main>'
----

A workaround is to limit the number the number of workers to 1, like this:

$ bundle config set --local jobs 1

I'll go with that workaround for now, but I want to bring attention 
about this issue to the maintainer.

Regards,
Daniel Abrahamsson


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