Bug #19986: Win32: `HOME` is set to just `HOMEDRIVE` if `HOMEPATH` is unset

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED

[nobu (Nobuyoshi Nakada)]

$ 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.