Properties of e:

e.number: -2146823279
e.stack: ReferenceError: 'BadType' is undefined
	at throwException (propertyvalidation.js:65:9)
	at bar (propertyvalidation.js:85:5)
	at foo (propertyvalidation.js:90:5)
	at Global code (propertyvalidation.js:93:1)


Deleting e.stack ...

e.stack after delete:
undefined
Properties of e:

e.number: -2146823279
e.stack: ReferenceError: 'BadType' is undefined
	at throwException (propertyvalidation.js:74:9)
	at bar (propertyvalidation.js:85:5)
	at foo (propertyvalidation.js:90:5)
	at Global code (propertyvalidation.js:93:1)


Updating e.stack ...

e.stack after update:
foo

Object.preventExtensions test:
true
true
true
true