Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Kernel#__method__ within a proc returns incorrect value after method definition #2212

Closed
gdeoliveira opened this issue Nov 17, 2014 · 5 comments
Closed

Kernel#__method__ within a proc returns incorrect value after method definition #2212

gdeoliveira opened this issue Nov 17, 2014 · 5 comments
Labels
core
Milestone
JRuby 9.2.1.0

Comments

@gdeoliveira
Copy link

When defining more than one method within a class using a proc that returns __method__ all methods will return the symbol representing the last defined method:

DEFINITION = proc { __method__ }

class C
  define_method :one, DEFINITION
  define_method :two, DEFINITION
end

o = C.new

puts o.one  #=> :two (in MRI this returns :one)
puts o.two  #=> :two

Casting DEFINITION into a code block during the method's definition seems to be working correctly though:

class C
  define_method :one, &DEFINITION
  define_method :two, &DEFINITION
end

o = C.new

puts o.one  #=> :one
puts o.two  #=> :two

A lengthier description of the problem can be found at this post in Stack Overflow.
gdeoliveira added a commit to gdeoliveira/mabbre that referenced this issue Nov 17, 2014
@gdeoliveira
Use workaround to avoid JRuby bug (jruby/jruby#2212).
0b59005
@kares
Copy link
Member

kares commented Jun 11, 2018

working as expected in JRuby 9.1.16 (and likely earlier releases as well) :

jruby-9.1.16.0 :046 > DEFINITION = proc { __method__ }
 => #<Proc:0xd23e042@(irb):46> 
jruby-9.1.16.0 :047 > 
jruby-9.1.16.0 :048 >   class C
jruby-9.1.16.0 :049?>     define_method :one, DEFINITION
jruby-9.1.16.0 :050?>     define_method :two, DEFINITION
jruby-9.1.16.0 :051?>   end
 => :two 
jruby-9.1.16.0 :052 > 
jruby-9.1.16.0 :053 >   o = C.new
 => #<C:0x66ea810> 
jruby-9.1.16.0 :054 > puts o.one 
two
 => nil 
jruby-9.1.16.0 :055 > puts o.two
two
 => nil

@kares kares closed this as completed Jun 11, 2018
@kares kares added this to the Invalid or Duplicate milestone Jun 11, 2018
@gdeoliveira
Copy link
Author

@kares, I believe this is still working incorrectly, as the following should print "one" instead to match MRI's behaviour:

jruby-9.1.16.0 :054 > puts o.one 
two
 => nil

@kares
Copy link
Member

kares commented Jun 11, 2018

@gdeoliveira right, have misread what is expected and what is JRuby behavior ... let's have it open than

@kares kares reopened this Jun 11, 2018
@kares kares removed this from the Invalid or Duplicate milestone Jun 11, 2018
@headius
Copy link
Member

headius commented Jun 11, 2018

Likely an issue with how the define_method methods share frames. However I'd have expected them to have their own names for super at least.

@headius headius mentioned this issue Jun 11, 2018
Merged
headius added a commit to headius/jruby that referenced this issue Jun 11, 2018
@headius
Clone proc blocks as well so they have their own frame etc.
f03fc20 
Fixes jruby#2212.
@headius headius added this to the JRuby 9.2.1.0 milestone Jun 11, 2018
@headius headius added the core label Jun 11, 2018
@headius
Copy link
Member

headius commented Jun 11, 2018

I pushed a PR that fixes this. Needs specs for the given case and for super inside a similar case as noted in #5214. @gdeoliveira Perhaps you'd like to try your hand at contributing to https://github.com/ruby/spec?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
core
Projects
None yet
Milestone
JRuby 9.2.1.0
Development

No branches or pull requests
3 participants
@headius @kares @gdeoliveira