Bug #13087: Regression of instance_exec behaviour in ruby 2.4

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
• Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN

[chucke (Tiago Cardoso)]

I've just caught up this running our test suite against the newly released ruby 2.4. Here is the repro gist:

class A                                    
  def initialize(x)                        
    @x = x                                 
  end                                      
  def perform                              
    puts "performing #{@x} times"          
  end                                      
end                                        
                                           
                                           
puts "basic"                               
A.new(1).tap do |a|                        
  a.instance_exec do                       
    perform                                
  end                                      
end                                        
                                           
#puts "advanced"                           
A.new(1).tap do |a|                        
  a.instance_exec(A.new(3), &:perform)     
end                                        
                                           

The last one output "3 times in all ruby 2's except latest 2.4 .

This seems to apply the to_proc symbol to the object itself, and not the argument of instance_exec, which is a regression.

[chucke (Tiago Cardoso)]

• ruby -v set to ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]

[nobu (Nobuyoshi Nakada)]

• Is duplicate of Bug #13074: When executing instance_exec with symbol.to_proc, it ignores first argument. added

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed