From c4b18a4c813126fa6fc95782cfeb50020a2283d1 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Fri, 22 Mar 2019 12:16:20 +0100
Subject: [PATCH] Force widget data to be a dictionary

---
 src/pretix/presale/views/cart.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/pretix/presale/views/cart.py b/src/pretix/presale/views/cart.py
index ba8d35c52..c42fbc54c 100644
--- a/src/pretix/presale/views/cart.py
+++ b/src/pretix/presale/views/cart.py
@@ -369,6 +369,8 @@ class CartAdd(EventViewMixin, CartActionMixin, AsyncAction, View):
         if "widget_data" in request.POST:
             try:
                 widget_data = json.loads(request.POST.get("widget_data", "{}"))
+                if not isinstance(widget_data, dict):
+                    widget_data = {}
             except ValueError:
                 widget_data = {}
             else: