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				@@ -267,7 +267,7 @@ define(['./compatibility'], function () { 
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				         st.addClass = function (className, superclass, iVarNames, pkgName) { 
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				             // While subclassing nil is allowed, it might be an error, so 
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				             // warn about it. 
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				-            if (typeof superclass == 'undefined' || superclass && superclass.a$nil) { 
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				+            if (typeof superclass === 'undefined' || superclass && superclass.a$nil) { 
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				                 console.warn('Compiling ' + className + ' as a subclass of `nil`. A dependency might be missing.'); 
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				             } 
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				             return buildBehaviorBody(pkgName, classBuilder(className, superclass, iVarNames, coreFns[className])); 
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