-Fixed not erroring when deserializing incomplete JSON with a parameterized constructor

Src/Newtonsoft.Json.Tests/Serialization/JsonSerializerTest.cs

@@ -9753,6 +9753,14 @@ Path '', line 1, position 1.");
             }
         }
 #endif
+
+        [Test]
+        public void ParametrizedConstructor_IncompleteJson()
+        {
+            string s = @"{""text"":""s"",""cursorPosition"":189,""dataSource"":""json_northwind"",";
+
+            ExceptionAssert.Throws<JsonSerializationException>(() => JsonConvert.DeserializeObject<CompletionDataRequest>(s), "Unexpected end when deserializing object. Path 'dataSource', line 1, position 63.");
+        }
     }
 
     public class DerivedWithPrivate : BaseWithPrivate
@@ -9912,4 +9920,20 @@ Path '', line 1, position 1.");
             z = 3;
         }
     }
+
+    public class CompletionDataRequest
+    {
+        public CompletionDataRequest(string text, int cursorPosition, string dataSource, string project)
+        {
+            Text = text;
+            CursorPosition = cursorPosition;
+            DataSource = dataSource;
+            Project = project;
+        }
+
+        public string Text { get; }
+        public int CursorPosition { get; }
+        public string DataSource { get; }
+        public string Project { get; }
+    }
 }

Src/Newtonsoft.Json/Serialization/JsonSerializerInternalReader.cs

@@ -2194,6 +2194,11 @@ namespace Newtonsoft.Json.Serialization
                 }
             } while (!exit && reader.Read());
 
+            if (!exit)
+            {
+                ThrowUnexpectedEndException(reader, contract, null, "Unexpected end when deserializing object.");
+            }
+
             return propertyValues;
         }