bin/rails aborted! with stacktrace involving prism and bundled_gems.rb

When using the snap on Ubuntu 24.04.3, then installing rails, then creating a new rails project causes crash/error stacktrace (see below).

Steps to reproduce the problem

1. Install ruby with sudo snap install ruby --classic
2. gem install rails, which by default goes into ~/.gem
3. Running rails new store will display bin/rails aborted! and a stacktrace that I'll paste below
4. The project does get created, but running any of the following will crash with a similar stacktrace:

• bin/rails server
• bin/rails db:create

Expected behavior

No stacktrace.

Actual behavior

The commands do no succeed and produce the following:

/snap/ruby/438/lib/ruby/3.4.0/prism.rb:83: warning: already initialized constant Prism::BACKEND
/snap/ruby/438/lib/ruby/3.4.0/prism.rb:83: warning: previous definition of BACKEND was here
/snap/ruby/438/lib/ruby/3.4.0/prism.rb:83: warning: already initialized constant Prism::BACKEND
/snap/ruby/438/lib/ruby/3.4.0/prism.rb:83: warning: previous definition of BACKEND was here
/snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require': NameError
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
	from /snap/ruby/438/lib/ruby/3.4.0/prism.rb:85:in '<top (required)>'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
	from ~/.gem/gems/rubocop-ast-1.47.1/lib/rubocop/ast.rb:4:in '<top (required)>'
	from ~/.gem/gems/rubocop-ast-1.47.1/lib/rubocop-ast.rb:3:in 'Kernel#require_relative'
	from ~/.gem/gems/rubocop-ast-1.47.1/lib/rubocop-ast.rb:3:in '<top (required)>'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
	from ~/.gem/gems/rubocop-1.81.7/lib/rubocop.rb:19:in '<top (required)>'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
	from /snap/ruby/438/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
	from ~/.gem/gems/rubocop-1.81.7/exe/rubocop:14:in '<top (required)>'
	from ~/.gem/bin/rubocop:25:in 'Kernel#load'
	from ~/.gem/bin/rubocop:25:in '<main>'

Ubuntu version

Ubuntu 24.04.3 LTS

Kernel version

Linux 6.14.0-34-generic

Ruby version

ruby 3.4.7 (2025-10-08 revision 7a5688e2a2) +PRISM [x86_64-linux]

Rails version

Rails 8.1.1

提示されている snap、gem install、Rails のコマンドを使って Ubuntu 24.04.3 で失敗を再現し、prism.rb と bundled_gems.rb の stacktrace のパスを rubocop-ast の読み込みパスと比較します。rails new、bin/rails server、bin/rails db:create が Prism の警告や NameError なしで実行できれば、作業は完了です。