Issue #12319 has been reported by Tsuyoshi Sawada.

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Bug #12319: `Module#const_get` does not accept symbol with nested name
https://bugs.ruby-lang.org/issues/12319

* Author: Tsuyoshi Sawada
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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`Module#const_get` accepts non-nested string, nested string, and non-nested symbol:

~~~ruby
class A; class B; class C end end end

A.const_get("B")    # => A::B
A.const_get("B::C") # => A::B::C
A.const_get(:B)     # => A::B
~~~

but does not accept nested symbol:

~~~ruby
A.const_get(:"B::C") # => NameError: wrong constant name B::C
~~~



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