[TIMOB-19734] Crash running iOS Search sample app

Run this app: https://github.com/appcelerator-developer-relations/appc-sample-appsearch Using 5_1_X release branch Crashes on app startup: [TRACE] [App Search] 1 0x10ede7965 -[KrollObject objectForTiString:context:] [TRACE] [App Search] 2 0x10ede2da5 KrollGetProperty [TRACE] [App Search] 3 0x10f14b4c7 TI::JSCallbackObject::getOwnPropertySlot(TI::JSObject*, TI::ExecState*, TI::PropertyName, TI::PropertySlot&) [TRACE] [App Search] 4 0x10f18c56a TI::JSObject::hasProperty(TI::ExecState*, TI::PropertyName) const [TRACE] [App Search] 5 0x10f19d5a0 TI::Stringifier::toJSON(TI::TiValue, TI::PropertyNameForFunctionCall const&) [TRACE] [App Search] 6 0x10f19843b TI::Stringifier::appendStringifiedValue(WTI::StringBuilder&, TI::TiValue, TI::JSObject*, TI::PropertyNameForFunctionCall const&) [TRACE] [App Search] 7 0x10f19a961 TI::Stringifier::Holder::appendNextProperty(TI::Stringifier&, WTI::StringBuilder&) [TRACE] [App Search] 8 0x10f198cfe TI::Stringifier::appendStringifiedValue(WTI::StringBuilder&, TI::TiValue, TI::JSObject*, TI::PropertyNameForFunctionCall const&) [TRACE] [App Search] 9 0x10f198118 TI::Stringifier::stringify(TI::Handle) [TRACE] [App Search] 10 0x10f19d413 TI::JSONProtoFuncStringify(TI::ExecState*) [TRACE] [App Search] 11 0x1653a9b7045