[ruby-core:115241] [Ruby master Bug#19986] Win32: `HOME` is set to just `HOMEDRIVE` if `HOMEPATH` is unset

5 Nov 2023

      Issue #19986 has been reported by nobu (Nobuyoshi Nakada).

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Bug #19986: Win32: `HOME` is set to just `HOMEDRIVE` if `HOMEPATH` is unset
https://bugs.ruby-lang.org/issues/19986

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Priority: Normal
* Backport: 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED
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```
$ env -u HOME -u USERPROFILE -u HOMEPATH HOMEDRIVE=no/such/home ./miniruby.exe -e 'p ENV["HOME"], Dir.home'
"no/such/home"
"no/such/home"
```

`HOMEDRIVE` should be ignored without `HOMEPATH`, and `HOME` should fallback to `CSIDL_PROFILE`.

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https://bugs.ruby-lang.org/