Fix wrong arguments in callv with const Array

core/variant/callable.cpp

@@ -73,12 +73,18 @@ void Callable::callp(const Variant **p_arguments, int p_argcount, Variant &r_ret
 Variant Callable::callv(const Array &p_arguments) const {
 	int argcount = p_arguments.size();
 	const Variant **argptrs = nullptr;
+
 	if (argcount) {
 		argptrs = (const Variant **)alloca(sizeof(Variant *) * argcount);
+
+		// Use a duplicate if the array is readonly, otherwise the addess of p_arguments->read_only will be copied
+		const Array &arguments_source = p_arguments.is_read_only() ? p_arguments.duplicate() : p_arguments;
+
 		for (int i = 0; i < argcount; i++) {
-			argptrs[i] = &p_arguments[i];
+			argptrs[i] = &arguments_source[i];
 		}
 	}
+
 	CallError ce;
 	Variant ret;
 	callp(argptrs, argcount, ret, ce);