AK: JsonParser improvements

- Parsing invalid JSON no longer asserts
    Instead of asserting when coming across malformed JSON,
    JsonParser::parse now returns an Optional<JsonValue>.
- Disallow trailing commas in JSON objects and arrays
- No longer parse 'undefined', as that is a purely JS thing
- No longer allow non-whitespace after anything consumed by the initial
  parse() call. Examples of things that were valid and no longer are:
    - undefineddfz
    - {"foo": 1}abcd
    - [1,2,3]4
- JsonObject.for_each_member now iterates in original insertion order

1 files changed, 4 insertions, 3 deletions

diff --git a/DevTools/Inspector/RemoteProcess.cpp b/DevTools/Inspector/RemoteProcess.cpp
index d1ceb61c3d..6e8dce5894 100644
--- a/DevTools/Inspector/RemoteProcess.cpp
+++ b/DevTools/Inspector/RemoteProcess.cpp
@@ -167,11 +167,12 @@ void RemoteProcess::update()
         dbg() << "Got data size " << length << " and read that many bytes";
 
         auto json_value = JsonValue::from_string(data);
-        ASSERT(json_value.is_object());
+        ASSERT(json_value.has_value());
+        ASSERT(json_value.value().is_object());
 
-        dbg() << "Got JSON response " << json_value.to_string();
+        dbg() << "Got JSON response " << json_value.value().to_string();
 
-        auto& response = json_value.as_object();
+        auto& response = json_value.value().as_object();
 
         auto response_type = response.get("type").as_string_or({});
         if (response_type.is_null())