ignore invalid regex

Author: aedenmurray

src/parser/jsonParser.ts

@@ -695,16 +695,7 @@ function validate(n: ASTNode | undefined, schema: JSONSchema, validationResult:
 
 		if (isString(schema.pattern)) {
 			const regex = extendedRegExp(schema.pattern);
-			if(regex === undefined) {
-				validationResult.problems.push({
-					location: { offset: node.offset, length: node.length },
-					message: l10n.t('Invalid schema pattern "{0}".', schema.pattern)
-				});
-
-				return;
-			}
-
-			if (!(regex.test(node.value))) {
+			if (regex && !(regex.test(node.value))) {
 				validationResult.problems.push({
 					location: { offset: node.offset, length: node.length },
 					message: schema.patternErrorMessage || schema.errorMessage || l10n.t('String does not match the pattern of "{0}".', schema.pattern)

src/test/parser.test.ts

@@ -614,12 +614,12 @@ suite('JSON Parser', () => {
 			properties: {
 				"one": {
 					type: 'string',
-					pattern: 'invalid pattern',
+					pattern: '*+ (invalid pattern)',
 				}
 			}
 		});
 
-		assert.strictEqual(semanticErrors!.length, 1);
+		assert.strictEqual(semanticErrors!.length, 0);
 
 		semanticErrors = validate2(jsonDoc, textDoc, {
 			type: 'object',