one-line: avoid crash on parse error

src/rules/oneLineRule.ts

@@ -97,7 +97,10 @@ class OneLineWalker extends Lint.AbstractWalker<Options> {
  case ts.SyntaxKind.InterfaceDeclaration:
  case ts.SyntaxKind.ClassDeclaration:
  case ts.SyntaxKind.ClassExpression: {
- this.check(getChildOfKind(node, ts.SyntaxKind.OpenBraceToken, sourceFile)!);
+ const openBrace = getChildOfKind(node, ts.SyntaxKind.OpenBraceToken, sourceFile);
+ if (openBrace !== undefined) {
+ this.check(openBrace);
+ }
  break;
  }
  case ts.SyntaxKind.IfStatement: {

test/rules/one-line/all/test.ts.fix

@@ -136,3 +136,16 @@ if (true) {
 } else {
  false;
 }
+
+// don't crash on parse error
+interface InvalidInterface = {
+ foo: string,
+}
+
+class InvalidClass = {
+ foo: string,
+}
+
+foo = class InvalidClassExpression = {
+ foo: string,
+}

test/rules/one-line/all/test.ts.lint

@@ -179,3 +179,16 @@ if (true) {
  ~~~~ [missing whitespace]
  false;
 }
+
+// don't crash on parse error
+interface InvalidInterface = {
+ foo: string,
+}
+
+class InvalidClass = {
+ foo: string,
+}
+
+foo = class InvalidClassExpression = {
+ foo: string,
+}