From: merch-redmine@...
Date: 2021-05-30T01:15:48+00:00
Subject: [ruby-core:104100] [Ruby master Bug#17887] Missed constant lookup	after prepend

Issue #17887 has been updated by jeremyevans0 (Jeremy Evans).


This is because unlike method tables, constant tables are not moved to origin classes.  This behavior has been present since origin classes were added in Ruby 2.0.  I submitted a pull request to work around this: https://github.com/ruby/ruby/pull/4538



----------------------------------------
Bug #17887: Missed constant lookup after prepend
https://bugs.ruby-lang.org/issues/17887#change-92274

* Author: bjfish (Brandon Fish)
* Status: Open
* Priority: Normal
* ruby -v: 2.6.x-3.0.x
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
**Description**
The following shows that the constant lookup from B does not find the constant in the prepended M module.  I would expect this lookup to behave like "B.include M" which does print the constant from module M.


**Example**
``` ruby
module M
  FOO = 'm'
end
class A
  FOO = 'a'
end
class B < A
  def foo
    FOO
  end
end
b = B.new
p b.foo
A.prepend M
p b.foo
```
**Expected Result**
```
"a"
"m"
```
**Actual Result**
```
"a"
"a"
```




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