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Bug #7765
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Proc#arity bug with optional argument
Description
We have:
Proc.new{|a, b, c, d, e|}.arity # => 5
Matz decided [ruby-core:46515] we also have:
Proc.new{|a, b, c, d, e=0|}.arity # => 4
It looks like we currently have:
Proc.new{|a, b=0, c, d, e|}.arity # => 1, should be same as above
Hopefully there won't be disagreement that this is a bug?
I'm asking in particular because there was a specific test committed by Yui to that effect. I hope this was just an oversight?
assert_equal(0, proc{|x=0, y|}.arity) # Should be 1, not 0. test/ruby/test_proc.rb:67
My patch is ready and I will commit it unless there is objection.
https://github.com/marcandre/ruby/compare/marcandre:trunk...marcandre:proc_curry
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