55034 2011-02-23 04:04:12 -0800 The global object's Math property should be deletable 2011-06-17 00:56:31 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) PC OS X 10.5 RESOLVED DUPLICATE 55343 P2 Normal --- 1 kent.hansen webkit-unassigned barraclough cmarcelo oldest_to_newest 356012 0 kent.hansen 2011-02-23 04:04:12 -0800 From ECMA-262 5th edition, section 15.1: "Unless otherwise specified, the standard built-in properties of the global object have attributes {[[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true}". The other built-in properties of the Global Object can be deleted just fine, as expected, but not the Math property. Is there some meaning behind this inconsistency? With V8, Math can be deleted. With SpiderMonkey, the delete operator returns true, but the property is still there afterwards. 422473 1 barraclough 2011-06-17 00:56:31 -0700 *** This bug has been marked as a duplicate of bug 55343 ***