gracefully catch errors when parsing membership state

lib/models/content/content.dart

@@ -17,11 +17,7 @@ import "package:nexus/models/content/topic.dart";
 import "package:nexus/models/content/sticker.dart";
 import "package:nexus/models/content/history_visibility.dart";
 
-class Content {
-  final Error? parseError;
-
-  const Content({this.parseError});
-
+class const Content({final String? parseError, final StackTrace? stackTrace}) {
   factory Content.fromJson(Map<String, dynamic> json) => const Content();
 
   Map<String, dynamic> toJson() => {};
@@ -35,9 +31,8 @@ class Content {
               .firstWhereOrNull((eventType) => eventType.type == type)
               ?.contentFromJson ??
           Content.fromJson)(json);
-    } catch (error) {
-      if (error is Error) return Content(parseError: error);
-      rethrow;
+    } catch (error, stackTrace) {
+      return Content(parseError: error.toString(), stackTrace: stackTrace);
     }
   }
 }
@@ -65,5 +60,5 @@ enum EventType(
   name("m.room.name", NameContent.fromJson),
   reaction("m.reaction", ReactionContent.fromJson),
   pinnedEvents("m.room.pinned_events", PinnedEventsContent.fromJson),
-  message("m.room.message", MessageContent.fromJson);
+  message("m.room.message", MessageContent.fromJson),
 }

lib/models/event.dart

@@ -58,16 +58,16 @@ class const Event({
         replyTo: replyToFromJson(getContentFromJson(json)),
         pmp: json["content"]?["com.beeper.per_message_profile"] == null
             ? null
-            : Profile.fromJsonWithCatch(
+            : .fromJsonWithCatch(
                 json["content"]?["com.beeper.per_message_profile"],
               ),
-        content: Content.fromEventJson(
+        content: .fromEventJson(
           getContentFromJson(json),
           json["decrypted_type"] ?? json["type"],
         ),
         previousContent: json["unsigned"]?["prev_content"] == null
             ? null
-            : Content.fromEventJson(
+            : .fromEventJson(
                 json["unsigned"]?["prev_content"],
                 json["decrypted_type"] ?? json["type"],
               ),

lib/widgets/renderers/event.dart

@@ -84,11 +84,11 @@ class const EventRenderer(
     final child = event.redactedBy != null || event.relationType == "m.replace"
         ? null
         : switch (event.content) {
-            Content(:final parseError?) => Row(
+            Content(:final parseError?, :final stackTrace) => Row(
               children: [
                 ErrorDialog(
                   "An error occurred while parsing event ${event.eventId}:\n$parseError",
-                  parseError.stackTrace,
+                  stackTrace,
                 ),
               ],
             ),