Windows: Fix encoding of Dir.home

Dir.home returns an UTF-8 string since ruby-3.0, but the actual
encoding of the bytes was CP_ACP or CP_OEMCP.
That led to invalid bytes when calling Dir.home with an unicode
username.

1 files changed, 2 insertions, 1 deletions

diff --git a/win32/file.c b/win32/file.c
index e047144d36..31cc1aff6e 100644
--- a/win32/file.c
+++ b/win32/file.c
@@ -266,7 +266,8 @@ rb_default_home_dir(VALUE result)
         rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
     }
     append_wstr(result, dir, -1,
-                       rb_w32_filecp(), rb_filesystem_encoding());
+                       CP_UTF8, rb_utf8_encoding());
+
     xfree(dir);
     return result;
 }