126075 2013-12-20 11:30:04 -0800 Deconstruction patterns in parameter list don't create local variables (wut?) 2013-12-20 11:30:04 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified NEW P2 Normal --- 1 oliver oliver oldest_to_newest 961939 0 oliver 2013-12-20 11:30:04 -0800 >>> function f([a,b]){} <global>#CaPZ5W:[0x7f90c9d08a70->0x11245f770, NoneGlobal]: 6 m_instructions; 48 bytes; 1 parameter(s); 2 callee register(s); 0 variable(s) [ 0] enter [ 1] mov loc0, Undefined(@k0) [ 4] end loc0 Constants: k0 = Undefined undefined >>> f([1,2]) <global>#CMJCpr:[0x7f90c9c104c0->0x11245f6f0, NoneGlobal]: 33 m_instructions; 264 bytes; 1 parameter(s); 10 callee register(s); 0 variable(s) [ 0] enter [ 1] mov loc0, Undefined(@k0) [ 4] resolve_scope loc3, f(@id0), 1 [ 10] get_from_scope loc1, loc3, f(@id0), 1 [ 18] new_array_buffer loc2, 0, 2 [ 23] call loc0, loc1, 2, 10 status(Not Set) Original; predicting None [ 31] end loc0 Identifiers: id0 = f Constants: k0 = Undefined f#EQKQNp:[0x7f90cc0070c0->0x110ecf570, NoneFunctionCall]: 47 m_instructions; 376 bytes; 2 parameter(s); 2 callee register(s); 0 variable(s) [ 0] enter [ 1] mov loc0, Int32: 0(@k0) [ 4] get_by_val loc0, arg1, loc0 Original; predicting None [ 10] resolve_scope loc1, a(@id0), 0 <- wit? ******* [ 16] put_to_scope loc1, a(@id0), loc0, 65536 [ 23] mov loc0, Int32: 1(@k1) [ 26] get_by_val loc0, arg1, loc0 Original; predicting None [ 32] resolve_scope loc1, b(@id1), 0 [ 38] put_to_scope loc1, b(@id1), loc0, 65536 [ 45] ret Undefined(@k2) Identifiers: id0 = a id1 = b Constants: k0 = Int32: 0 k1 = Int32: 1 k2 = Undefined undefined