From: "usa (Usaku NAKAMURA)" <noreply@...>
Date: 2021-11-24T10:35:02+00:00
Subject: [ruby-core:106260] [Ruby master Bug#18173] The feature in `$LOADED_FEATURES` is loaded again

Issue #18173 has been updated by usa (Usaku NAKAMURA).

Backport changed from 2.6: REQUIRED, 2.7: REQUIRED, 3.0: DONE to 2.6: REQUIRED, 2.7: DONE, 3.0: DONE

ruby_2_7 61a02168f7ba353a2838f2783f291a816d7e0c90 merged revision(s) ddb32e66160ab50849419ef7c7ac584913b79c34.

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Bug #18173: The feature in `$LOADED_FEATURES` is loaded again
https://bugs.ruby-lang.org/issues/18173#change-94880

* Author: nobu (Nobuyoshi Nakada)
* Status: Closed
* Priority: Normal
* Backport: 2.6: REQUIRED, 2.7: DONE, 3.0: DONE
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In general, the feature name registered in `$LOADED_FEATURES` (e.g. "enumerator.so", "thread.rb", and so on) is expected not to be loaded again.

But, as @ko1 reported, when a feature name is added to the variable during another file is required, it will be loaded again.

```shell
$ echo 'raise __FILE__' > target.rb
$ echo '$" << "target.rb"' > provide.rb
$ ruby -r./provide.rb target.rb 
target.rb:1:in `<main>': target.rb (RuntimeError)
```




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