[ruby-core:73550] [Ruby trunk - Bug #12029] [Open] Not all elements are yielded when count is given a block

Issue #12029 has been reported by Jason Yeo.

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Bug #12029: Not all elements are yielded when count is given a block
https://bugs.ruby-lang.org/issues/12029

* Author: Jason Yeo
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 2.3.0
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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When count is called on an enumerable that yields multiple elements, not all elements are yielded to the block.

~~~
def foo
  yield 1, 2
end

to_enum(:foo).count { |e| e == [1, 2] }
# Returns: 0
# Expected: 1
~~~

It appears that only the first element is yielded:

~~~
to_enum(:foo).count { |e| p e; e == [1, 2] }
# Prints 1
~~~




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