[ruby-core:107423] [Ruby master Bug#18436] Fix Pathname dot directory globbing

Issue #18436 has been updated by jnchito (Junichi Ito).


I noticed this change just now. We have some programs which depended on the previous behavior. It loses backward compatibility, so I think it should have been noted in NEWS.md in Ruby 3.1.0. I understand it's too late to say that, though.

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Bug #18436: Fix Pathname dot directory globbing
https://bugs.ruby-lang.org/issues/18436#change-96323

* Author: bkuhlmann (Brooke Kuhlmann)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [arm64-darwin21.2.0]
* Backport: 2.6: DONTNEED, 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONE
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## Overview

With 3.1.0, I'm seeing different behavior when trying to obtain directories which have a dot (.) prefix. With 3.0.x, `..` would be answered but with 3.1.0, `..` is missing. Is this to be expected because the [documentation](https://rubyapi.org/3.1/o/dir#method-c-glob) states that `Dir.glob` should include `..` since `Pathname.glob` wraps `Dir.glob`.

If this is desired behavior feel free to close this issue but it caught me by surprise so wanted to ask in case it's a concern. Thanks!

## Screenshots/Screencasts

(see attached screenshot where I demonstration behavior between 3.0.3 and 3.1.0.)

## Steps to Recreate

1. Create a new project directory called "demo" and then change directory to "demo".
2. Create a sub-directory call `.config`.
3. Using Ruby 3.0.3, launch IRB.
4. Run: `require "pathname"`
5. Run: `Pathname.glob("*", File::FNM_DOTMATCH).select(&:directory?).sort`
6. Repeat Steps #4 - #5 using 3.1.0 this time and notice the difference in behavior.

## Environment

Ruby 3.0.3 and 3.1.0.


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screenshot.png (48.2 KB)


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