Comment (by Roland Haas):

I’d add a comment describing this to the code, otherwise a future reader may wonder why the size of 1 is needed or put the whole block into a if(nsrsc > 0) {...} block which makes the reason explicit in code but is a larger and possibly hard to do (if the extra scope causes issues) change.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2783/mol-avoid-empty-array