Size: Menhancementgood first issue
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Excerpt from @pmikkelsen's message: A good idea is actually to pass something that isn't an array at all, and make sure we get the correct error. For example, 1+# should give an error. I have seen non-array arguments causing errors more than once.
In the interpreter, there are certain macros to check the rank of an array for example, and it is used like xxx->Rank. If some code is passed a namespace, the xxx->Rank will return garbage data, and likely cause a crash.