Fix for #1564: Return empty array instead of single element nil array in value array processor #1993
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This changes the return of a nil result through the
RedisValueArrayProcessorso that it's a[]instead of a single element[ nil ]in our handling.This affects the following commands, which are multibulk when a count is provided (even if it's 1), otherwise they are bulkstring. This change affects the non-count case when it's null. Instead of a single element array with a nil value, we'd return an empty array as the Redis surface area intends:
LPOP/RPOPSRANDMEMBERSPOPThe other usages of
RedisValueArrayProcessorare always multibulk and are not affected:HMGETHKEYSHVALSLRANGEMGETSDIFFSINTERSUNIONSMEMBERSSORTXCLAIMZ(REV)RANGEZ(REV)RANGEBYLEXZ(REV)RANGEBYSCORE