Issue #9223 has been reported by dmarcotte (Daniel Marcotte).

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Bug #9223: Hash#reject!.size does not reflect changes to the hash
https://bugs.ruby-lang.org/issues/9223

Author: dmarcotte (Daniel Marcotte)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0p353
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


Here's an example demonstrating the issue, comparing to the regular reject behavior:  

h = {a: 'A', b: 'B'}
reject_enum = h.reject
reject_bang_enum = h.reject!
h[:c] = 'C'
p reject_enum.size # 3
p reject_bang_enum.size # 2



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