Bug #9520: Arity of a Proc obtained by Symbol#to_proc

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: 2.1
• Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN

[prijutme4ty (Ilya Vorontsov)]

I'm not sure is it a bug, but I find this behavior wrong.
:to_s.to_proc.arity # => -1
but isn't :to_s.to_proc is the same as ->(x){x.to_s} whose arity is 1?

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Rejected

The proc created by Symbol#to_proc is not a lambda, but a proc, which accepts arbitrary number arguments.