fix(#2041):cannot use struct as key of a map

gnovm/pkg/gnolang/values.go

@@ -1541,10 +1541,10 @@ func (tv *TypedValue) ComputeMapKey(store Store, omitType bool) MapKey {
 		sv := tv.V.(*StructValue)
 		sl := len(sv.Fields)
 		bz = append(bz, '{')
+		bzl := FieldTypeList(bt.Fields).Types()
 		for i := 0; i < sl; i++ {
 			fv := fillValueTV(store, &sv.Fields[i])
-			ft := bt.Fields[i]
-			omitTypes := ft.Elem().Kind() != InterfaceKind
+			omitTypes := bzl[i].Kind() != InterfaceKind
 			bz = append(bz, fv.ComputeMapKey(store, omitTypes)...)
 			if i != sl-1 {
 				bz = append(bz, ',')

gnovm/tests/files/struct58.gno

@@ -0,0 +1,23 @@
+package main
+
+type I interface {
+	dummy()
+}
+type IS struct{}
+
+func (iss IS) dummy() {
+}
+
+type S struct {
+	x int
+	I
+}
+
+func main() {
+	m := make(map[S]string)
+	m[S{0, IS{}}] = "test"
+	println(m)
+}
+
+// Output:
+// map{(struct{(0 int),(struct{} main.IS)} main.S):("test" string)}