From: aaron.lasseigne@...
Date: 2019-02-10T20:28:57+00:00
Subject: [ruby-core:91505] [Ruby trunk Bug#15597] syscall not returning true from private_method_defined?

Issue #15597 has been reported by AaronLasseigne (Aaron Lasseigne).

----------------------------------------
Bug #15597: syscall not returning true from private_method_defined?
https://bugs.ruby-lang.org/issues/15597

* Author: AaronLasseigne (Aaron Lasseigne)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
`syscode` is a private method on `Object` but when checked with `private_method_defined?` it returns `false`.

Ruby 2.6.1
```
irb(main):001:0> Object.new.private_methods.sort.select { |pm| !Object.private_method_defined?(pm) }
=> [:syscall]
```

Ruby 2.5.3
```
irb(main):001:0> Object.new.private_methods.sort.select { |pm| !Object.private_method_defined?(pm) }
=> []
```



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