Heiko Seebach created JRUBY-6568:
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Summary: A Proc on a symbol like (&:first) works in 1.8, but not
in 1.9 mode
Key: JRUBY-6568
URL: https://jira.codehaus.org/browse/JRUBY-6568
Project: JRuby
Issue Type: Bug
Components: Ruby 1.9.2
Affects Versions: JRuby 1.6.7
Environment: Ubuntu 10.11 - x64
Reporter: Heiko Seebach
Assignee: Thomas E Enebo
The following code fragment should show it clearly.
{code}
me@mypc:~/$ cat test.rb
class Array
def proc_on_first
yield([0])
end
end
ary = [[42]]
p ary.proc_on_first{|b|b.first}
p ary.proc_on_first(&:first)
me@mypc:~/$ jruby --1.9 test.rb
0
NoMethodError: undefined method `first' for 0:Fixnum
proc_on_first at test.rb:3
(root) at test.rb:10
me@mypc:~/$ jruby --1.8 test.rb
0
0
me@mypc:~/$
{code}
There are severeal issues concerning Procs, Symbols and &, but I couldn't find
one that shows this behaviour.
In MRI Ruby 1.9.2 and 1.9.3 this works fine like in JRuby --1.8
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