Bug #15564: Pathname#+(pathpart) returns pathpart when pathpart is absolute

• Status: Rejected
• Assignee: akr (Akira Tanaka)
• Target version: -
• ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
• Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN

[Malakai97 (Bryan Hockey)]

abs = Pathname.new("/abs/dir")
my = Pathname.new("/my/path")

# actual
my/abs # => #<Pathname:/abs/dir>

# expected
my/abs # => #<Pathname:/my/dir/abs/dir>

While this behavior is desirable in #expand_path, here I believe it is very surprising.

I am happy to submit a patch for this should it be confirmed as a bug.

[Malakai97 (Bryan Hockey)]

Also affects #/
Also affects #join

[znz (Kazuhiro NISHIYAMA)]

• Assignee set to akr (Akira Tanaka)

[akr (Akira Tanaka)]

• Status changed from Open to Rejected

It is intentional behavior.

It intends that preserving the file by a pathname (especially for absolute pathname).