var blg:String = "foo";
var big:Sprite = new Sprite();
var error:int = big.length(); 

import flash.display.Sprite;
var sprite1:Sprite = new Sprite();
var q:String = sprite1.stage.quality;

var obj:Object = new Object();
obj.a = "foo";
trace(obj.b.prop);

You can also see this error because of a misspelling, for example in the following, where mc represents a MovieClip object in the display list, and the stage property is misspelled with a capital S (it should be stage):

trace(mc.Stage.quality);

This error also appears for out-of-range assignments, such as the following:

var m0:int = 2147483648; // int.MAX_VALUE == 2147483647

You can also see this error when using the bitwise left shift operator (<<). For example, consider the following code:

var m0:uint = 0xFF;
var m1:uint = m0<<24;

The result of left shift operator (<<) is interpreted as a 32-bit two's complement number with sign. In the example, the result is a negative value, which causes the error when assigned to the uint typed property. A workaround is the following:

var m0:uint = 0xFF;
var m1:uint = uint(m0<<24);

class A {
	   function f() {}
	}

var a = new A()
	var m = a.f // extract f, don't call it
	m() // same as a.f()
	new m() // causes this error

trace("hello world")
	trace(x) // x is undefined
	var y
	trace(y) // No error, y is defined.

class A {} // sealed class, not dynamic
	trace(new A().x) // no property x defined on A, and A is not dynamic

class A() {}
class B extends A {
  function f() { trace(super.f()); } // error 1070, there is no f on A
}

<foo:x xmlns:clowns='http://circuscenter.org'>

addNamespace, appendChild, childIndex, inScopeNamespaces, insertChildAfter, insertChildBefore, name, namespace, localName, namespaceDeclarations, nodeKind, prependChild, removeNamespace, replace, setChildren, setLocalName, setName, and setNamespace.

• Parsing an XMLList style object as XML
• Misbalanced strings

<a/><b></b

ns = new Namespace ("prefix", "");
	

var re:RegExp = new RegExp("ali", /s)

var re2:RegExp = new RegExp(re, ...)

public function doSomething(const:int):void {
	}
	this ["doSomething"] ("str")