Don't return success as an error when the lookup result is empty

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/sagernet/quic-go v0.0.0-20230919101909-0cc6c5dcecee
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
 	github.com/sagernet/sing v0.2.10-0.20230912050851-1453c7c8c20d
-	github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b
+	github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601
 	github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400
 	github.com/sagernet/sing-quic v0.0.0-20230919102644-5874c56aae1c
 	github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0

go.sum

@@ -118,8 +118,8 @@ github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
 github.com/sagernet/sing v0.2.10-0.20230912050851-1453c7c8c20d h1:dWUNsHDX8EMeGj1XCnrVtydy5C+5D+Orc5JjZP7myHg=
 github.com/sagernet/sing v0.2.10-0.20230912050851-1453c7c8c20d/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
-github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b h1:m/UWg2voyb94YCWAMInMXIQ91qQGZ6utPAwKCYrlciI=
-github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
+github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601 h1:UJYRkncWVpNdNIXeJV/eBilTc3Rga9G1SDBWjKSxL4w=
+github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
 github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400 h1:LtpYd5c5AJtUSxjyH4KjUS8HT+2XgilyozjbCq/x3EM=
 github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
 github.com/sagernet/sing-quic v0.0.0-20230919102644-5874c56aae1c h1:yvErV+elwbXU+uyT8BsOci5b86TACtCKIFpCPTaIk7A=

test/go.mod

@@ -76,7 +76,7 @@ require (
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 // indirect
 	github.com/sagernet/quic-go v0.0.0-20230919101909-0cc6c5dcecee // indirect
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 // indirect
-	github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b // indirect
+	github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601 // indirect
 	github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400 // indirect
 	github.com/sagernet/sing-shadowtls v0.1.4 // indirect
 	github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641 // indirect

test/go.sum

@@ -133,8 +133,8 @@ github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
 github.com/sagernet/sing v0.2.10-0.20230912050851-1453c7c8c20d h1:dWUNsHDX8EMeGj1XCnrVtydy5C+5D+Orc5JjZP7myHg=
 github.com/sagernet/sing v0.2.10-0.20230912050851-1453c7c8c20d/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
-github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b h1:m/UWg2voyb94YCWAMInMXIQ91qQGZ6utPAwKCYrlciI=
-github.com/sagernet/sing-dns v0.1.9-0.20230911082806-425022bdc92b/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
+github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601 h1:UJYRkncWVpNdNIXeJV/eBilTc3Rga9G1SDBWjKSxL4w=
+github.com/sagernet/sing-dns v0.1.9-0.20230919110447-d24aeae07601/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
 github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400 h1:LtpYd5c5AJtUSxjyH4KjUS8HT+2XgilyozjbCq/x3EM=
 github.com/sagernet/sing-mux v0.1.3-0.20230908032617-759a1886a400/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
 github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0 h1:9wHYWxH+fcs01PM2+DylA8LNNY3ElnZykQo9rysng8U=