Ruby » Ruby master

Bug #15758

Updated by dux (Dino Reic) about 5 years ago

in short https://i.imgur.com/qvIIBuu.png 

 Object.const_defined?('Baz::Bar') -> true 

 yet Baz::Bar -> class not found! 

 test to run, all ok on ruby 2.6.0, bug in 2.6.2 

 ~~~ruby 
 class Foo 
 end 

 class Bar 
 end 

 class Baz 
   class Foo 
   end 
 end 

 ### 

 def report klass 
   name       = "Object.const_defined?('%s')" % klass 
   exists     = Object.const_defined?(klass) 
   instance = eval klass rescue nil 
   check      = (exists && instance) || (!exists && !instance)? 'ok' : 'ERROR!' 

   puts [ 
     name.ljust(35), 
     exists.to_s.ljust(5), 
     (instance ? instance.to_s : 'nil').ljust(8), 
     check 
   ].join(' -> ') 
 end 

 report 'Foo' 
 report 'Bar' 
 report 'Baz' 
 report 'Naat' 
 report 'Baz::Foo' 
 report 'Baz::Bar' 
 report 'Baz::Naat' 
 puts     '---' 
 report 'Baz::Foo::Bar::Baz::Foo' # true in 2.6.2 :) 
 ~~~ 

 running produces output 

 ~~~ 
 Object.const_defined?('Foo')          -> true    -> Foo        -> ok 
 Object.const_defined?('Bar')          -> true    -> Bar        -> ok 
 Object.const_defined?('Baz')          -> true    -> Baz        -> ok 
 Object.const_defined?('Naat')         -> false -> nil        -> ok 
 Object.const_defined?('Baz::Foo')     -> true    -> Baz::Foo -> ok 
 Object.const_defined?('Baz::Bar')     -> true    -> nil        -> ERROR! 
 Object.const_defined?('Baz::Naat')    -> false -> nil        -> ok 
 --- 
 Object.const_defined?('Baz::Foo::Bar::Baz::Foo') -> true    -> nil        -> ERROR! 
 ~~~ 

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