fix: some torrents can not resovle (#857)

internal/protocol/bt/fetcher_test.go

@@ -96,7 +96,7 @@ func doResolve(t *testing.T, fetcher fetcher.Fetcher) {
 			Hash: "8a55cfbd5ca5d11507364765936c4f9e55b253ed",
 		}
 		if !reflect.DeepEqual(want, fetcher.Meta().Res) {
-			t.Errorf("Resolve() got = %v, want %v", fetcher.Meta().Res, want)
+			t.Errorf("Resolve Single File Resolve() got = %v, want %v", fetcher.Meta().Res, want)
 		}
 	})
 
@@ -136,7 +136,16 @@ func doResolve(t *testing.T, fetcher fetcher.Fetcher) {
 			Hash: "ccbc92b0cd8deec16a2ef4be242a8c9243b1cedb",
 		}
 		if !reflect.DeepEqual(want, fetcher.Meta().Res) {
-			t.Errorf("Resolve() got = %v, want %v", fetcher.Meta().Res, want)
+			t.Errorf("Resolve Multi Files Resolve() got = %v, want %v", fetcher.Meta().Res, want)
+		}
+	})
+
+	t.Run("Resolve Unclean Torrent", func(t *testing.T) {
+		err := fetcher.Resolve(&base.Request{
+			URL: "./testdata/test.unclean.torrent",
+		})
+		if err != nil {
+			t.Errorf("Resolve Unclean Torrent Resolve() got = %v, want nil", err)
 		}
 	})