[ruby-core:124362] [Ruby Bug#21806] `bundler/inline` generates "uninitialized constant Gem::NameTuple" only when RUBY_BOX=1

25 Dec 2025


      Issue #21806 has been reported by sinsoku (Takumi Shotoku).

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Bug #21806: `bundler/inline` generates "uninitialized constant Gem::NameTuple" only when RUBY_BOX=1
https://bugs.ruby-lang.org/issues/21806

* Author: sinsoku (Takumi Shotoku)
* Status: Open
* ruby -v: ruby 4.0.0 (2025-12-25 revision 553f1675f3) +PRISM [arm64-darwin25]
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN
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## Steps to reproduce

1. 

```ruby
# issue.rb
require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"
  gem "json"
end

require "json"
puts JSON::VERSION
```


## Expected behavior

## Actual behavior

```
```


-- 
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