Prevent modification of Period jCal object when converting to iCal st…

…ring
kewisch · Oct 15, 2022 · 2fedc5c · 2fedc5c
1 parent 2f21bc4
commit 2fedc5c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/ical/design.js b/lib/ical/design.js
@@ -419,7 +419,6 @@ const icalValues = extend(commonValues, {
     }
   },
   period: {
-
     fromICAL: function(string) {
       let parts = string.split('/');
       parts[0] = icalValues['date-time'].fromICAL(parts[0]);
@@ -432,6 +431,7 @@ const icalValues = extend(commonValues, {
     },
 
     toICAL: function(parts) {
+      parts = parts.slice();
       if (!design.strict && parts[0].length == 10) {
         parts[0] = icalValues.date.toICAL(parts[0]);
       } else {