StacktraceTop: operator-> (this=0xffffffff) at ../Source/JavaScriptCore/runtime/WriteBarrier.h:123 isString (this=0xffffffff) at ../Source/JavaScriptCore/runtime/JSCellInlines.h:124 JSC::JSCell::toPrimitive (this=0xffffffff, exec=exec@entry=0x7f6567b7fb58, preferredType=preferredType@entry=JSC::PreferString) at ../Source/JavaScriptCore/runtime/JSCell.cpp:128 JSC::JSValue::toStringSlowCase (this=<optimized out>, exec=0x7f6567b7fb58) at ../Source/JavaScriptCore/runtime/JSCJSValue.cpp:312 JSC::getByVal (exec=0x7f6567b7fb58, baseValue=..., subscript=..., returnAddress=...) at ../Source/JavaScriptCore/jit/JITOperations.cpp:1383
StacktraceTop: JavaScriptCore/ runtime/ WriteBarrier. h:123 JavaScriptCore/ runtime/ JSCellInlines. h:124 :toPrimitive (this=0xffffffff, exec=exec@ entry=0x7f6567b 7fb58, preferredType= preferredType@ entry=JSC: :PreferString) at ../Source/ JavaScriptCore/ runtime/ JSCell. cpp:128 :toStringSlowCa se (this=<optimized out>, exec=0x7f6567b7 fb58) at ../Source/ JavaScriptCore/ runtime/ JSCJSValue. cpp:312 7fb58, baseValue=..., subscript=..., returnAddress=...) at ../Source/ JavaScriptCore/ jit/JITOperatio ns.cpp: 1383
operator-> (this=0xffffffff) at ../Source/
isString (this=0xffffffff) at ../Source/
JSC::JSCell:
JSC::JSValue:
JSC::getByVal (exec=0x7f6567b