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    <pre><code>class MyClass &lt; BasicObject class Error &lt; ::NoMethodError def method_missing(....) raise Error end end end p MyClass.superclass # =&gt; BasicObject p method(:raise).owner # =&gt; Kernel </code></pre> <p>Now <code>Kernel</code> is not present in the ancestor chain of <code>MyClass</code> class. Thus when you are calling <code>raise</code> inside the <code>method_missing</code> method,which in turn again call <code>method_missing</code> method(Because <code>raise</code> is not a method of class <code>MyClass</code>,nor the owner <code>Kernel</code> mixed in <code>Myclass</code>,so <code>raise</code> method look up is failed,and causing repeatedly call to <code>method_missing</code>. Thus it results in error as <code>SystemStackError: stack level too deep</code>. I tried here to recreate the scenarios what you are facing as below :</p> <pre><code>class Foo &lt; BasicObject def method_missing(name,*args) p "hi" end end Foo.new.baz # stack level too deep (SystemStackError) </code></pre> <p>Here also the reason is same.There is no <code>Foo#baz</code> method,so <code>method_missing</code> called first time. Now inside <code>method_missing</code>, I am trying to call another method,which is method of class <code>Kernel</code>. Now <code>Kernel</code> is not mixed in neither <code>BasicObject</code>,nor in <code>Foo</code>. So method look up got failed,and <code>method_missing</code> called repeatedly due to call to the method <code>Kernel#p</code>,and it causes the error. To fix this I would do as below :</p> <pre><code>class Foo &lt; BasicObject include ::Kernel def method_missing(name,*args) p "hi" end end Foo.new.baz # =&gt; "hi" </code></pre> <p>Hope you got the point now.</p>
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    1. PODon't understand why I get stack level too deep error
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    1. USArup Rakshit
    1. USArup Rakshit
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    1. PODon't understand why I get stack level too deep error
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    1. COThank you. I guess this is fixed if we mixin Kernel or if we simply use Object instead of BasicObject
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    2. CO@Nanego You got the explanation right?
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    3. COThank you very much! :)
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