Symbol.to_proc inconsistencies

gistfile1.rb

def mymeth
  puts "Hello"
end

puts :mymeth.to_proc.call

#SOLAR:~ chriswhite$ ruby -v
#rubinius 1.2.5dev (1.8.7 1b8a960a yyyy-mm-dd JI) [x86_64-apple-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#Hello
#nil

#SOLAR:~ chriswhite$ ruby -v
#jruby 1.6.3 (ruby-1.8.7-p330) (2011-07-07 965162f) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_26) [darwin-x86_64-java]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#ArgumentError: no receiver given
#    call at org/jruby/RubyProc.java:268
#    call at org/jruby/RubyProc.java:228
#  (root) at test_proc.rb:5

#SOLAR:~ chriswhite$ ruby -v
#ruby 1.9.3dev (2011-07-31) [x86_64-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#test_proc.rb:5:in `call': no receiver given (ArgumentError)
#	from test_proc.rb:5:in `<main>'

def mymeth
  puts "Hello"
end

puts :mymeth.to_proc.call nil

#SOLAR:~ chriswhite$ ruby -v
#rubinius 1.2.5dev (1.8.7 1b8a960a yyyy-mm-dd JI) [x86_64-apple-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#Hello
#nil

#SOLAR:~ chriswhite$ ruby -v
#jruby 1.6.3 (ruby-1.8.7-p330) (2011-07-07 965162f) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_26) [darwin-x86_64-java]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#Hello
#nil

#SOLAR:~ chriswhite$ ruby -v
#ruby 1.9.3dev (2011-07-31) [x86_64-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#test_proc.rb:31:in `call': private method `mymeth' called for nil:NilClass (NoMethodError)
#	from test_proc.rb:31:in `<main>'

def mymeth(name)
  puts "Hello #{name}"
end

puts :mymeth.to_proc.call nil, "John"

#SOLAR:~ chriswhite$ ruby -v
#rubinius 1.2.5dev (1.8.7 1b8a960a yyyy-mm-dd JI) [x86_64-apple-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#Hello John
#nil

#SOLAR:~ chriswhite$ ruby -v
#jruby 1.6.3 (ruby-1.8.7-p330) (2011-07-07 965162f) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_26) [darwin-x86_64-java]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#Hello John
#nil

#SOLAR:~ chriswhite$ ruby -v
#ruby 1.9.3dev (2011-07-31) [x86_64-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#test_proc.rb:55:in `call': private method `mymeth' called for nil:NilClass (NoMethodError)
#	from test_proc.rb:55:in `<main>'

p (1..3).collect(&:to_s.to_proc)

#SOLAR:~ chriswhite$ ruby -v
#rubinius 1.2.5dev (1.8.7 1b8a960a yyyy-mm-dd JI) [x86_64-apple-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#["1", "2", "3"]

#SOLAR:~ chriswhite$ ruby -v
#jruby 1.6.3 (ruby-1.8.7-p330) (2011-07-07 965162f) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_26) [darwin-x86_64-java]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#["1", "2", "3"]

#SOLAR:~ chriswhite$ ruby -v
#ruby 1.9.3dev (2011-07-31) [x86_64-darwin10.8.0]
#SOLAR:~ chriswhite$ ruby test_proc.rb
#["1", "2", "3"]