fix: fixes panic on unexported field access.

Author: atombender

dump.go

@@ -134,10 +134,12 @@ func (s *dumpState) dumpSlice(v reflect.Value) {
 }
 
 func (s *dumpState) dumpStruct(v reflect.Value) {
-	val := v.Interface()
-	if t, ok := val.(time.Time); ok && s.timeFormatter != nil {
-		s.writeString(s.timeFormatter(t))
-		return
+	if v.CanInterface() {
+		val := v.Interface()
+		if t, ok := val.(time.Time); ok && s.timeFormatter != nil {
+			s.writeString(s.timeFormatter(t))
+			return
+		}
 	}
 
 	dumpPreamble := func() {

dump_test.go

@@ -263,6 +263,19 @@ func TestSdump_RecursiveMaps(t *testing.T) {
 	runTests(t, "recursive_maps", mp)
 }
 
+type unexportedStruct struct {
+	x int
+}
+type StructWithUnexportedType struct {
+	unexported unexportedStruct
+}
+
+func TestSdump_unexported(t *testing.T) {
+	runTests(t, "unexported", StructWithUnexportedType{
+		unexported: unexportedStruct{},
+	})
+}
+
 var standardCfg = litter.Options{}
 
 func runTestWithCfg(t *testing.T, name string, cfg *litter.Options, cases ...interface{}) {

testdata/unexported.dump

@@ -0,0 +1,5 @@
+litter_test.StructWithUnexportedType{
+  unexported: litter_test.unexportedStruct{
+    x: 0,
+  },
+}