From: "byroot (Jean Boussier)" <noreply@...>
Date: 2022-01-17T11:42:30+00:00
Subject: [ruby-core:107158] [Ruby master Bug#18495] `LC_ALL=C.UTF-8` sets `Encoding.default_external` to `Encoding::US_ASCII`

Issue #18495 has been reported by byroot (Jean Boussier).

----------------------------------------
Bug #18495: `LC_ALL=C.UTF-8` sets `Encoding.default_external` to `Encoding::US_ASCII`
https://bugs.ruby-lang.org/issues/18495

* Author: byroot (Jean Boussier)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-darwin21]
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
Original bug report on Bootsnap: https://github.com/Shopify/bootsnap/issues/395#issuecomment-1014421271

```bash
$ env LC_ALL=en_US.UTF-8 ruby -e 'p Encoding.default_external'
#<Encoding:UTF-8>
$ env LC_ALL=C.UTF-8 ruby -e 'p Encoding.default_external'
#<Encoding:US-ASCII>
```

I'm not particularly familiar with `LC_ALL`, but from what I gathered online, `C.UTF-8` is supposed to mean "no internationalization, but UTF-8 support".




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