removeSchema called with id without matching schema does not throw error

lib/ajv.js

@@ -187,7 +187,7 @@ function Ajv(opts) {
     switch (typeof schemaKeyRef) {
       case 'string':
         var schemaObj = _getSchemaObj(schemaKeyRef);
-        self._cache.del(schemaObj.jsonStr);
+        if (schemaObj) self._cache.del(schemaObj.jsonStr);
         delete self._schemas[schemaKeyRef];
         delete self._refs[schemaKeyRef];
         break;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ajv",
-  "version": "3.5.4",
+  "version": "3.6.0",
   "description": "Another JSON Schema Validator",
   "main": "lib/ajv.js",
   "files": [

spec/ajv.spec.js

@@ -261,6 +261,13 @@ describe('Ajv', function () {
       // should.not.exist(ajv.getSchema('//e.com/int.json'));
       should.not.exist(ajv._cache.get(str));
     });
+
+    it('should not throw if there is no schema with passed id', function() {
+      should.not.exist(ajv.getSchema('//e.com/int.json'));
+      should.not.throw(function() {
+        ajv.removeSchema('//e.com/int.json');
+      });
+    });
   });
 
 

spec/v5/$data/constant.json

@@ -146,5 +146,51 @@
         "valid": true
       }
     ]
+  },
+  {
+    "description": "property value is contained in array",
+    "schema": {
+      "properties": {
+        "name": { "type": "string" },
+        "list": {
+          "type": "array",
+          "contains": { "constant": { "$data": "2/name" } }
+        }
+      }
+    },
+    "tests": [
+      {
+        "description": "1 item array containing property is valid",
+        "data": {
+          "name": "foo",
+          "list": [ "foo" ]
+        },
+        "valid": true
+      },
+      {
+        "description": "2 item array containing property is valid",
+        "data": {
+          "name": "foo",
+          "list": [ "foo", "bar" ]
+        },
+        "valid": true
+      },
+      {
+        "description": "array not containing property is invalid",
+        "data": {
+          "name": "foo",
+          "list": [ "bar" ]
+        },
+        "valid": false
+      },
+      {
+        "description": "empty array is invalid",
+        "data": {
+          "name": "foo",
+          "list": []
+        },
+        "valid": false
+      }
+    ]
   }
 ]