Added try-catch for return Matchers

src/WireMock/Matchers/JSONPathMatcher.cs

@@ -1,4 +1,5 @@
-using JetBrains.Annotations;
+using System;
+using JetBrains.Annotations;
 using Newtonsoft.Json.Linq;
 using WireMock.Validation;
 
@@ -35,10 +36,17 @@ namespace WireMock.Matchers
             if (input == null)
                 return false;
 
-            JObject o = JObject.Parse(input);
+            try
-            JToken token = o.SelectToken(_pattern);
+            {
-
+                JObject o = JObject.Parse(input);
-            return token != null;
+                JToken token = o.SelectToken(_pattern);
+                
+                return token != null;
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }

src/WireMock/Matchers/RegexMatcher.cs

@@ -1,4 +1,5 @@
-using System.Text.RegularExpressions;
+using System;
+using System.Text.RegularExpressions;
 using JetBrains.Annotations;
 using WireMock.Validation;
 
@@ -32,7 +33,17 @@ namespace WireMock.Matchers
         /// </returns>
         public bool IsMatch(string input)
         {
-            return input != null && _expression.IsMatch(input);
+            if (input == null)
+                return false;
+
+            try
+            {
+                return _expression.IsMatch(input);
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }

src/WireMock/Matchers/XPathMatcher.cs

@@ -1,4 +1,5 @@
-using System.Xml;
+using System;
+using System.Xml;
 using JetBrains.Annotations;
 using WireMock.Validation;
 using Wmhelp.XPath2;
@@ -36,10 +37,17 @@ namespace WireMock.Matchers
             if (input == null)
                 return false;
 
-            var nav = new XmlDocument { InnerXml = input }.CreateNavigator();
+            try
-            object result = nav.XPath2Evaluate($"boolean({_pattern})");
+            {
+                var nav = new XmlDocument { InnerXml = input }.CreateNavigator();
+                object result = nav.XPath2Evaluate($"boolean({_pattern})");
 
-            return true.Equals(result);
+                return true.Equals(result);
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }