Issue #14853 has been reported by nobu (Nobuyoshi Nakada).

----------------------------------------
Bug #14853: [BACKPORT] NameError#receiver at private constant returns a hidden object
https://bugs.ruby-lang.org/issues/14853

* Author: nobu (Nobuyoshi Nakada)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: r63695
* Backport: 2.3: REQUIRED, 2.4: REQUIRED, 2.5: REQUIRED
----------------------------------------
Fixed by r63696.

```ruby
module M
  X = 1
  private_constant :X
end
begin
  Module.new{include M}::X
rescue NameError => e
  e.receiver.object_id # undefined method `object_id' for #<M:0x000000010c5f7e88> (NoMethodError)
end
```

This is an `ICLASS` object which must not appear in the ruby level.



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