fix(pipeline): clear placeholder pipeline error after execution (#61)

Fixes issue where commands would retain "pipeline has not been executed"
error even after successful execution by properly setting the error state.

Signed-off-by: Zeeshan Hussain <[email protected]>
Signed-off-by: Rueian <[email protected]>

Author: zeeshan-zomato

rueidiscompat/pipeline.go

@@ -3210,6 +3210,7 @@ func (c *Pipeline) Exec(ctx context.Context) ([]Cmder, error) {
 		if r.NonRedisError() != nil {
 			err = r.NonRedisError()
 		}
+		rets[i].SetErr(nil)
 		rets[i].from(r)
 	}
 

rueidiscompat/tx.go

@@ -46,6 +46,7 @@ func (c *TxPipeline) Exec(ctx context.Context) ([]Cmder, error) {
 		err = TxFailedErr
 	}
 	for i, r := range results {
+		rets[i].SetErr(nil)
 		rets[i].from(*(*rueidis.RedisResult)(unsafe.Pointer(&proxyresult{
 			err: resp[i+1].NonRedisError(),
 			val: r,