From: usa@...
Date: 2016-06-10T07:14:54+00:00
Subject: [ruby-core:75926] [Ruby trunk Bug#12389] Module#constants includes	non-constants

Issue #12389 has been updated by Usaku NAKAMURA.

Backport changed from 2.1: REQUIRED, 2.2: REQUIRED, 2.3: REQUIRED to 2.1: REQUIRED, 2.2: DONE, 2.3: REQUIRED

ruby_2_2 r55356 merged revision(s) 55182.

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Bug #12389: Module#constants includes non-constants
https://bugs.ruby-lang.org/issues/12389#change-59117

* Author: Jan Lelis
* Status: Closed
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
* Backport: 2.1: REQUIRED, 2.2: DONE, 2.3: REQUIRED
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Hi Ruby Core,

I noticed that `Module#constants(false)` sometimes includes modules/classes with a lowercase name:

```ruby
Complex.constants # => [:I]
Complex.constants(false) # => [:compatible, :I]
Complex.const_defined? :compatible # NameError: wrong constant name compatible

NameError.constants # => []
NameError.constants(false) # => [:message]
```

Also:

- Rational --> compatible
- IO --> generic_readable
- IO --> generic_writable



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