[ruby-dev:49130] [Ruby trunk - Bug #11296] Proc#arity returns weird value for non-lambda proc with optional arguments

Issue #11296 has been updated by Hans Mackowiak.


i think matz means:
Proc.new(){|x=0|}.arity # => 0 
lambda {|x=0|}.arity # => -1 


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Bug #11296: Proc#arity returns weird value for non-lambda proc with optional arguments
https://bugs.ruby-lang.org/issues/11296#change-53089

* Author: Yukihiro Matsumoto
* Status: Feedback
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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`Proc.new(x=0){}.arity` returns 0, not -1 unlike lambdas.
I don't remember if it's intentional or not.  Anyone remember?

Matz.




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