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				@@ -3,6 +3,7 @@ package session 
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				 import ( 
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				 	"io/ioutil" 
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				 	"os" 
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				+	"strings" 
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				 	"time" 
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				 ) 
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				@@ -14,7 +15,7 @@ func Clean(tmpdir string) error { 
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				 	for _, file := range files { 
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				 		if len(file.Name()) == 40 { 
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				 			if diff := time.Since(file.ModTime()); diff > 24*time.Hour { 
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				-				err = os.Remove(tmpdir + string(os.PathSeparator) + file.Name()) 
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				+				err = os.Remove(strings.Join([]string{tmpdir, file.Name()}, string(os.PathSeparator))) 
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				 				if err != nil { 
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				 					return err 
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				 				} 
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