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Late, but for the record this is what you get when an operation fails (returns nil/NO) but doesn't set the NSError out-parameter.

(If you don't signal failure with nil/NO, you'll need to use the swift_error attribute: https://t.co/nSiZACDFbb. Indeed, no docs is a problem.)

— Jordan Rose (@UINT_MIN) January 31, 2020
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8 weeks ago by mjtsai
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