[ruby-core:72829] [Ruby trunk - Bug #11983] [Open] define_method not raising error for invalid method name

Issue #11983 has been reported by Anil Maurya.

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Bug #11983: define_method not raising error for invalid method name
https://bugs.ruby-lang.org/issues/11983

* Author: Anil Maurya
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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**Steps to Reproduce:**

Inside irb:

Class A
end

A.send(:define_method, "may_run!?") do |*args, &block|
  p "random text"
end

a = A.new

a.may_run!?

* never return from this function.

-----------------------------------------------

IF I try to declare this function using class_eval 

A.class_eval <<-EQRUBY
  def may_run!?
    p 'some text'
  end
EQRUBY
end

I got error: syntax error, unexpected '?', expecting ';' or '\n'.

I think class_eval behaviour is right because may_run!? is invalid name for method and define_method should raise error instead of defining it.




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