feat(cookies,encoding): panic handling

internals/cookies/encoding.go

@@ -2,6 +2,7 @@ package cookies
 
 import (
 	e "errors"
+	"fmt"
 	"math/bits"
 	"net/http"
 	"reflect"
@@ -119,6 +120,12 @@ func Unmarshal[T any](data http.Cookie, v *TypedCookie[T]) error {
 func forEachField(v *reflect.Value, callback func(fv *reflect.Value, ft *reflect.StructField) error) (err error) {
 	t := v.Type()
 
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("Panic while trying to loop through fields. Error:\n%v", r)
+		}
+	}()
+
 	for i := 0; i < t.NumField(); i++ {
 		ft := t.Field(i)
 		fv := v.FieldByName(ft.Name)

internals/cookies/encoding_test.go

@@ -62,3 +62,15 @@ func TestUnmarshal(t *testing.T) {
 		t.Fatalf("Assertion failed, expected:\n%v\n\nfound:\n%v", TEST_VALUE, tc.TypedValue)
 	}
 }
+
+func TestPanicUnmarshal(t *testing.T) {
+	type Private struct {
+		//nolint:unused
+		privateField string `cookie:"private"`
+	}
+	var tc TypedCookie[Private]
+	err := Unmarshal(http.Cookie{Value: "private:Hello world"}, &tc)
+	if err == nil {
+		t.Fatalf("Function did not recover from panic, resulting value:\n%v", tc)
+	}
+}