diff --git a/analyzer.go b/analyzer.go
index b1c16d5..a7ceec7 100644
--- a/analyzer.go
+++ b/analyzer.go
@@ -49,7 +49,7 @@ func (a *Analyzer) DoError(jerr *JavaError) (matched []SolutionPossibility, err
 				}
 			}
 			if len(e.Message) == 0 { // when ignore error message, error type provide 100% score weight
-				sol.Match /= 10 / 100
+				sol.Match /= 10.0 / 100
 			} else {
 				jemsg, _ := split(jerr.Message, '\n')
 				matches := lineMatchPercent(jemsg, e.Message) // error message weight: 90%
diff --git a/cmd/mcla_wasm/utils.go b/cmd/mcla_wasm/utils.go
index f4ae8e7..91f7b27 100644
--- a/cmd/mcla_wasm/utils.go
+++ b/cmd/mcla_wasm/utils.go
@@ -32,10 +32,12 @@ func asJsValue(v any) (res js.Value) {
 	}
 	buf, err := json.Marshal(v)
 	if err != nil {
+		fmt.Println("Error in asJsValue: json.Marshal:", err)
 		panic(err)
 	}
 	var v1 any
 	if err = json.Unmarshal(buf, &v1); err != nil {
+		fmt.Println("Error in asJsValue: json.Unmarshal:", err)
 		panic(err)
 	}
 	return js.ValueOf(v1)